fixing webstart index page that allows to set custom intro page for OMERO.web
Implemented maximum file size limit for import
removing unnecessary import
Fix CLI plugins to comply with PEP8 1.5.0
Fix OmeroPy CLI unit tests to comply with PEP8
Merge pull request #2209 from sbesson/rebased/develop/pep8_1.5.0

Pep8 1.5.0 (rebased onto develop)
Merge remote-tracking branch 'origin' into limit_number_of_imports
Merge pull request #2205 from knabar/fix-webgateway-missing-imports

Add missing imports, undefined variable fix
Implemented @jburel suggestions
Merge remote-tracking branch 'origin/develop' into webstart_index_template
Merge remote-tracking branch 'origin/develop' into minify_media_viewer_only
merge develop -D org: PR 1960 (Remove cut link 11882)
merge develop -D org: PR 2127 (Working view to email announcements to selected users, groups, email addresses and/or all users)
merge develop -D org: PR 2160 (Warning dialog before deletion of linked images)
merge develop -D org: PR 2165 (Inplace file path)
merge develop -D org: PR 2177 (develop: Update upgrade check handling in OMERO.web)
merge develop -D org: PR 2182 (Read only flag)
merge develop -D org: PR 2188 (Close the RFS and kill the root session.)
merge develop -D org: PR 2189 (Bugfix: Weird behaviour after switching users)
merge develop -D org: PR 2192 (Check for duplicate pixels IDs when adding to list.)