vimrc - correct RainbowParentheses configuration

This includes
- Correcting `VimEnter` to `Syntax`
- Changing the file pattern from *.clj to *.cljs to * , so that any type
  of file can make use of the plugin. This avoids the situation where we
  start vim by editing a non Clojure / non ClojureScript file, then edit
  a Clojure / ClojureScript file and see that the RainbowParentheses is
  not working.

Signed-off-by: Pang Yan Han <pangyanhan@gmail.com>
bashrc - set TERM to screen-256color

Signed-off-by: Pang Yan Han <pangyanhan@gmail.com>
vimrc - configure Rainbow Parentheses colors

The darkgray and black colors do not show a great contrast with the
background color of the solarized dark theme.

Signed-off-by: Pang Yan Han <pangyanhan@gmail.com>
Add .gitignore

Signed-off-by: Pang Yan Han <pangyanhan@gmail.com>