Fix vimfiler#util#print_error()
setlocal concealcursor=nvc
Merge pull request #162 from itchyny/master

setlocal concealcursor=nvc
Fix handlers
Fix g:vimfiler_draw_files_limit problem
Fix #164 error message
Add g:vimfiler_min_cache_files
Fix handler error message
Fix buffer directory behavior
Fix a error message when using fugitive's 'Gread' command.
Merge pull request #166 from neutralevil/hotfix

Fix a error message when using fugitive's 'Gread' command.
Fix #167 BufRead handler
Fix #168 redraw problem
Fix #169 open problem
Fix vimfiler#util#is_win_path()
Fix unexpand tree
Fix browser check
Fix #170 redraw problem
Fix documentation
Added option to enable jumping to first child

This options lets you set if you want to automatically jump to the first child
when you expand a directory tree.