Enhance gitshots after commit.

Now it saves the project name too.
Remove project name from gitshot hook

The point is: I would have to manually copy the new version of the hook
in every git project since `git init` doesn't override existing hooks.
And I don't want to.
Remove .jar files from gitignore-global

I need .jar files to be committed for some projects; now gitignore-global
doesn't ignore them anymore.
Add path to executables from Android SDK
Clean post-commit hook in git template directory
Manually merge post-commit changes
Clean .brew