Fix spelling of 'assignee'

No need to install custom phantomjs for travis.

Merge branch 'feature/add_user_to_projects_in_group-2298' of https://github.com/zzet/gitlabhq into zzet-feature/add_user_to_projects_in_group-2298

fix warning 'nohup: redirecting stderr to stdout' for resque.sh

Fix shared Redis connection issue on Passenger

Fix replace return with next in rake rask

related issue https://github.com/gitlabhq/gitlabhq/issues/2045

Fixed broken link to developer guide, fixes #2380

Update doc/install/installation.md

Better support for error handling in dev environment

'th -> the' typo