Add a getContrastColor method to the renderer TrackerExtension
Add GitHub labels management for projects
Merge branch 'framework' into labels

Conflicts:
	templates/projects/projects.index.twig
Merge branch 'framework' into labels
Add support for GitHub labels (receive only)
Fix CS
Change <label>s to <span>s
Add error log view
Merge branch 'framework' of github.com:joomla/jissues into labels

Conflicts:
	cli/CliApp/Command/Get/Issues.php
Merge pull request #125 from joomla/labels

Labels
Fix class name
Composer update
Correct log files for GitHub logs
Add a CONTRIBUTING.md file
Drop unused tables
Restructure DB install DDL, add FKs as appropriate
Tweaks after installing
Drop categories table
Drop tracker_fields_values table
Merge pull request #137 from joomla/dbSchema

Database Schema Cleanup