Merge branch 'hotfix/readme_droits_users'
Update Gemfile
Create cas_server.sample
Update cas_server.sample
Delete cas_server.rb

and Added cas_server.sample. to be copied.
Update constants.sample
Update database.erb

Setting env for production
Create database.sample
Update database.sample

setting a sample configuration
Delete database.erb

replaced by a database.sample file
Delete database.rb

no need to be in the repo
Update .gitignore

ignores config files that are machine specific.
Update tasks.rake

creating config file if needed, in "install" task.
Update tasks.rake
Update tasks.rake

Ruby Syntax (Poor guy am I...)
Update README.md
Suppressing config/constants.rb dependancy
Update tasks.rake
Update README.md

Update install procedure.
Update README.md

typo