Update bootstrap.py
Update development and CI configurations

- Add CI tests for Plone 5.0
Enable profiling information and fix omelette eggs
Flake8
JSHint
Disable code analysis on imports
Disable code analysis Zope Page Tempates
Refactor browser views code to make it easier to access and maintain
Allow failures in CI under Plone 4.2
Remove dependency on collective.z3cform.widgets
Update RF tests
Fix deletion of image from @@media view
Fix dependencies
Follow ZCML style guide
Drop support of Plone 4.2
Remove needless try/except
Adding locking behaviour / starting robot test
Refactor tests
Fix hidden profiles (CC @rodfersou)

Part of this fix was mistakenly included in 1b83e7349f0e76aac1e5b88fb28afd3fdb48a9ea.
Merge branch 'master' into issue_104_v20