Sticking with default syntastic_mode_map.

Too many problems...

For some reason when I define:

    let g:syntastic_mode_map = {'mode': 'passive',
                                   \ 'active_filetypes': [],
                                   \ 'passive_filetypes': []}

It seems to only work inside .vimrc and not in plugin/syntastic.vim

Another thing,

    map <F7> :SyntasticCheck<CR>

Works however, when I invoke :SyntasticCheck when an error list buffer already
exists, it screws up everything. The screen goes black and weird things happen.
Syntastic is now passive on Python and LaTeX files.