1.0.6 - the crucible branch

A very quick release to fix the immediate last release which was missing a settings.py variable related to ENABLE_WEBAPP_DEBUG in v1.0.5-crucible-beta The variable had been included in config management but not the codebase hence it tested fine.

Changes include:

• The addition of a missing settings.py variable in v1.0.5-crucible-beta ENABLE_WEBAPP_DEBUG

• Added a check to validate_settings.py for ENABLE_WEBAPP_DEBUG

• Minor modification to webapp.py and backend.py to handle it not being defined gracefully

• Fixed a minor bug in the webapp/backend.py to not 500 if no metric_like row ids are found in the MySQL result

• Bumped version to 1.0.6