Bump RAILS_VERSION on Gemfile

Also update some rails dependencies on .lock file
Put colon between host and port in example mongo config
Remove Taskmapper

Unfuddle issue tracker was the only one using Taskmapper,
Instead we can use a simple ActiveResource implementation for it
Use get/post instead of match on routes
Dont use ^ and $ on email_regexp
Merge pull request #594 from errbit/fix_regexp

Dont use ^ and $ on email_regexp
Update CHANGELOG.md

[ci skip]
Merge pull request #593 from errbit/rework_routes

Use get/post instead of match on routes
Merge pull request #592 from arthurnn/remove_taskmapper

Remove Taskmapper
Improve fingerprints when error messages differ only in object memory addresses
Gitlab Issues integration update
Merge pull request #597 from 1st8/better-fingerprints

Improve fingerprints when error messages differ only in object memory addresses
Merge pull request #598 from jozefvaclavik/master

Gitlab Issues integration update
Update Gemfile.lock with new gitlab gem

See #598
Fix spec after merging #598