bash: add bash commands alias file

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
git: add git commands auto completion

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
tmux: add tmux config file

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
ssh: add ssh config file

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
irssi: add irssi config files, scripts and themes

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
bash: update the .bashrc

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
git: update the git global config file

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
bash: update bash config file .inputrc

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
vim: update _vimrc and plugins

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>
mail: update mail realated clients

Signed-off-by: Guangliang Zhao <lucienchao@gmail.com>