Add new aliases and functions
Fix and update install script

1. Add test for existing vundle directory.
2. Fix variable name, and update Vundle plugin install command.
3. Change to use 'if' condition; '[[' did not work properly on Ubuntu.
Add bashrc, curlrc and wgetrc files
Refactor and reorganize to work on multiple os

1. Delete local aliases.
2. Reorganize bash_profile.
3. Move osx specific aliases and settings to new file.
Update vimrc, add new plugins
Update bash prompt and tmux conf

1. Update tmux status line.
2. Add copy paste shortcuts for tmux.
3. Update bash prompt for solarized dark theme.
Update gitconfig and gitignore