Disable the keymap for <C-F> & <C-B> of tex_9.
    changed tab from 4 to 2 for tex file.
    do not source java config in ftplugin/java at the end.
    let all *.tex be taken as latex file.
    Some config for tex_9.
Changed \ref to \cref for keymap in tex_9.
Changed snippets for table in tex_9.
Add plugin nerdtree.
Added file explorer VimExplorer.
Added snippet for compactitem for tex_9.