javascript/jsl: update conf flag option
javascript/jsl: update conf flag option

Make it so you only have to set g:syntastic_javascript_jsl_conf to
"/path/to/conf" rather than "-conf /path/to/conf"

Closes #405

nikmartin/dotfiles,wezhang/vim-setup,wezhang/vim-setup,wezhang/vim-setup,wezhang/vim-setup,wezhang/vim-setup,wezhang/vim-setup