Many changes:

    * Remove neobundle dependence rules:
        * vimfiler to unite
        * vimshell to unite
        because unite is neobundled explicitly.

    * Add new plugin, 'indentline', and configuration section for it.

    * New nmap: \neo

    * Remove nmaps for OO Oj Ok permanently, 'unimpaired' did better.

    * add fold level (2) to plugin configuration sections.