add multi-term and new cateogry console

Signed-off-by: Superbil <superbil@gmail.com>
remove git-commit-mode

git-commit-mode has been merged into Magit project.

Signed-off-by: Superbil <superbil@gmail.com>
add exec-path-from-shell Package

A GNU Emacs library to setup environment variables from the user's
shell.

Signed-off-by: Superbil <superbil@gmail.com>