Starting my changes

First commit after clone, added some functionally like install from
Formula or adding some warnings before install or uninstall something.
I also added a async apps list for install. Anyway, this need a lot of
work to be a good app :)
Adding windows for install and progress

When installing something, will appear a window with the progress of
the installation and its output, but the window cannot be close. When
the installation is finished the window could be closed and the list of
Brews installed is refreshed automatically.
The search function for Install a new Brew discard all already
installed Brews.
Windows will open over the main
Fixed some warnings from Xcode
Add some commands from brew

Added:
- brew update
- brew outdated
- brew prune
- brew upgrade
- brew cleanup
- Clean Cache
Show a window with the output of the command
Merge pull request #1 from melchor629/master

melchor629