Adapt .osx configuration.

 - Disable many adjustments
 - Disable unused app preferences
 - Change some settings
Fix terminal colors and adapt PS1.
Update some exports.

 - Reenable "clear screen after man page"
Add some .extra configuration.

 - PATH additions for bew
 - GIT credentials
 - PHP shortcuts
 - JAVA home
 - Ruby autocompletion
Add some git shortcodes.
Update .vimrc with some changes.