Python: Add python initialization elisp module

This elisp module is used to configure Python mode.

This commit installs jedi and ropemacs

PS:
After the first install, execute
M-x jedi:install-server in Emacs

,----[ Additional setup(Ubuntu14.04) ]
| $ sudo apt-get install pymacs pyflakes
| $ sudo pip install rope ropemacs virtualenv elpy
`----

Additionally, move yasnippet init to init.el(after python mode
initialization). However when popup menu is displayed during yas, enter
key still do not work. Need to check this further.

Signed-off-by: Ratheesh S <ratheeshreddy@gmail.com>
Tested-by: Ratheesh S <ratheeshreddy@gmail.com>