Add git ciam alias

Signed-off-by: Thameera Senanayaka <thameera123@gmail.com>
Fix history substring search in all machines

Added zshenv and some key bindings
Tested in Ubuntu 12.10, 12.04 and OpenSUSE

DOES NOT search for more than one word though.
Eg: 'vi' works, but 'vi a' works only for vi.

Signed-off-by: Thameera Senanayaka <thameera123@gmail.com>