Simplified conditions and used porcelain git status.

Also removed the timing and prompt assist from the git logic.
Added default variable settings.
Corrected the prompt handling.
Patched up detailed git implementation.
Revered to vividchalk again due to cursor pos.

Patched installer bugs (git extraction related).

Updated readme to reflect changes in prompt.
Patched decompression process for wget/curl.
Updated readme to reflect dependencies.