Merge pull request #969 from raptium/master

Changes message sort clauses for MySQL, fixes issue #961.
Ensure all project and team slugs that are null or empty strings get set
Improve default configuration
note about SECRET_KEY
Gracefully handle exceptions without stacktrace items
Only attempt to modify system path when VIRTUAL_ENV is set
rename cursor key because I have no idea how jQuery works
Revert "rename cursor key because I have no idea how jQuery works"

This reverts commit 9f825f1a91b9b510b8ab24b9e2aaab3626d33810.
rename cursor key because I have no idea how jQuery works
Remove use of console.log
Correct box on remote member page
Move max length constants
Use max length constants for model defs
Shortcut tags added via TagPlugin that are beyond the max value length
Move table_exists helper into sentry.utils.db
Default the culprit to a trimmed version of the url
Allow mail to be completely disabled for a project
6.0.6
Hide plugins which cannot be enabled per-project
Update locale