.gitignore: add .gitignore

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
command: cleanup run() function

Using shutil instead of os.system() to copy file, make code
readable.

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
vman: Fix except print

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>