Added note and colour tagging functionality#42

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singe wants to merge 3 commits intopixel:masterfrom singe:master

+298-5

Commits on May 7, 2020

Added initial per-byte notes functionality.
singe
committed

Commits on May 8, 2020

Added initial custome color tagging for bytes or byte ranges
singe
committed

Commits on May 26, 2020

Added tag file reading and writing.
singe
committed