Update README.md

Used grammarly tool to fix several grammar errors.

README.md

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 # swgoh.gg crawler and CLI tool
 
-For Star Wars Galaxy of Heroes players and tech savvy,
-tools provided in this reposity allows them to crawl and use
-their data synced to https://swgoh.gg website.
+For Star Wars Galaxy of Heroes players and tech-savvy, tools provided in this repository allows them to crawl and use their data synced to https://swgoh.gg website.
 
 ## API for Go lang
 
-A package that crawls and fetch data is available at
+A package that crawls and fetches data is available at
 
-	ronoaldo.gopkg.net/swgoh/swgohgg
+    ronoaldo.gopkg.net/swgoh/swgohgg
 
-If you aim to build a tool that uses the website data,
-please first ask site authors for their approval.
+If you aim to build a tool that uses the website data, please first ask site authors for their approval. Also, keep in mind that they may pose rate-limit for your requests in order to prevent website overload.
 
 ## CLI
 
-You can use this command line interface to parse your
-characters and mods.
+You can use this command line interface to parse your characters, ships, and mods. The data is cached as a JSON file that you can parse and use in other apps. The output to stdout can also be used for several purposes, such as feed data into a spreadsheet.
 
 ### Install or Download
 
-If you just want to use it, go to the [Relase Page](https://github.com/ronoaldo/swgoh/releases)
-and download the one for your operating system.
+If you just want to use it, go to the [Relase Page](https://github.com/ronoaldo/swgoh/releases) and download the one for your operating system.
 
-From the command prompt, you can also run this commands if
-you have Go setup and ready:
+You can also install this commands if you have the Go language tools:
 
-	go get ronoaldo.gopkg.net/swgoh/cmd/swgoh
+    go get ronoaldo.gopkg.net/swgoh/cmd/swgoh
 
 To see the full list of available options, run:
 
-	swgoh --help
+    swgoh --help
 
 ### Ships list
 
-To list your ships, you can use the following
-command:
+To list your ships, you can use the following command:
 
-	swgoh -profile ronoaldo -ships
+    swgoh -profile ronoaldo -ships
 
-The result is a CSV list of your ships, their
-level, and stars.
+The result is a CSV list of your ships, their level, and stars.
 
 ### Character list
 
-To list your characters, you can use the following
-command:
+To list your characters, you can use the following command:
 
-	swgoh -profile ronoaldo -chars
+    swgoh -profile ronoaldo -chars
 
-The result is a CSV list of your characters, their
-level, stars and gear level.
+The result is a CSV list of your characters, their level, stars, and gear level.
 
 ### Mods and Mod Set suggestions
 
-The tool has some experimental mod suggestion, and is also
-capable to export your mdos into CSV format for your
-spreadsheet lovers.
+The tool has some experimental mod suggestion and is also capable to export your mods into CSV format for your spreadsheet lovers.
 
-	swgoh -profile ronoaldo -mods
+    swgoh -profile ronoaldo -mods
 
-You can also ask the tool to suggest a set that contains a
-maximum ammount of a given stat (ignoring bonus sets!)
+You can also ask the tool to suggest a set that contains the maximum amount of a given statistic (ignoring bonus sets!)
 
-	swgoh -profile ronoaldo -mods -max-set 'Critical Chance'
+    swgoh -profile ronoaldo -mods -max-set 'Critical Chance'
 
-Finally, you can ask the tool to optimize a set by trial and error.
-This is currently a dumb deep search in all possible mod sets and
-combinations. The algorithm is very simplified, does no optimizations
-and is *very slow*, but works. Often, max-set is enough but if you
-want to super maximize a given stat:
+Finally, you can ask the tool to optimize a set by trial and error. This is currently a dumb deep search in all possible mod sets and combinations. The algorithm is very simplified, does no optimizations and is *very slow*, but works. Often, max-set is enough but if you want to super maximize a given statistic:
 
-	swgoh -profile ronoaldo -mods -optimize-set 'Critical Chance'
+    swgoh -profile ronoaldo -mods -optimize-set 'Critical Chance'
 
 ### Caching
 
-Caching is performed in your HOME folder, in a file named
-swgoh.*yourprofile*.*mods or roster*.json
+Caching is performed in your personal folder, `$HOME` on *nix machines, using a file named `swgoh.*yourprofile*.*mods or roster*.json`.
 
-You can delete these files to update the data from the website.
-Currently, the cache does not expires, but this can be changed
-in the future.
+You can delete these files to update the data from the website. Currently, the cache does not expire, but this can be changed in the future. You can also use the `--cache=false` command line switch to get always fresh data.