feat(retrieval): add support for recursive scraping, version endpoint

Add support for setting the recursive flag in registration to scrape all sub-layers for display in the viewer. Also add support for version endpoint, which returns... the version.

Closes #45

run.py

@@ -4,7 +4,7 @@
 """
 from __future__ import division, print_function, unicode_literals
 
-import json, jsonschema, config, os, sys, logging, flask, re
+import json, jsonschema, config, os, sys, logging, flask
 from services import db, v1, v2, utils
 
 from logging.handlers import RotatingFileHandler
@@ -63,10 +63,6 @@ def log_response(sender, response):
 def before_request():
     flask.g.get_validator = lambda: jsonschema.validators.Draft4Validator(json.load(open(schema_path)))
     flask.g.proxies = {'http': app.config['HTTP_PROXY'], 'https': app.config['HTTP_PROXY']}
-    with open("setup.py") as f:
-        for line in f:
-            if "version" in line:
-                flask.g.version_no = re.findall("\d+\.\d+.\d+", line)
 
 if app.config.get('DEBUG_ENDPOINTS'):
     @app.after_request

services/retrieval.py

@@ -1,4 +1,4 @@
-import db, json, flask
+import db, json, re
 
 from utils import jsonp
 from flask import Response
@@ -96,4 +96,8 @@ def __init__(self):
 
 class Version(Doc):
     def get(self):
-        return flask.g.version_no
+        with open("setup.py") as f:
+            for line in f:
+                if "version" in line:
+                    version_no = re.findall("\d+\.\d+.\d+", line)
+        return version_no