Remove development.md

doc/development.md

-## Development tips:
-
-
-### Installation
-
-Install the Gitlab development in a virtual machine with the [Gitlab Vagrant virtual machine](https://github.com/gitlabhq/gitlab-vagrant-vm). Installing it in a virtual machine makes it much easier to set up all the dependencies for integration testing.
-
-
-### Start application in development mode
-
-#### 1. Via foreman
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-    bundle exec foreman start -p 3000
-
-#### 2. Manually
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-    bundle exec rails s
-    bundle exec rake environment resque:work QUEUE=* VVERBOSE=1
-
-
-### Test DB setup & seed
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-    bundle exec rake db:setup RAILS_ENV=test
-    bundle exec rake db:seed_fu RAILS_ENV=test
-
-
-###  Run the Tests
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-    # All in one
-    bundle exec rake gitlab:test
-
-    # Rspec
-    bundle exec rake spec
-
-    # Spinach
-    bundle exec rake spinach