Remove all plugins from the repository

Signed-off-by: hjan <hoeppner.jan@xurv.org>
Add a basic install script
    The script installs the basic vim setup, can update the whole setup
    and can install and update plugins. Use ./install.sh help for some
    infos.

Add gitignore to the repository
Add a list with used plugins
    This list includes URLs to the git repositories of the plugins
    used by this setup. The install script is using this file in
    order to update and install plugins (Note: plugins have to be
    removed manually still. The install script doesn't do that based
    on the plugin list yet)

Signed-off-by: hjan <hoeppner.jan@xurv.org>