sub: Update lib_build in vshelp
sub: Add visual maps to diffusable
Replace tabular with easy-align

Tabular has always been multiple seconds on my startup time and
easy-align appears to be properly autoloaded (0 sec in --startuptime).

The mappings seem pretty easy to use and there's a Tabular-like command.

Inspiration to switch:
http://www.reddit.com/r/vim/comments/2lsr8d/vimeasyalign_the_most_ingenious_plugin_ive/
sub: include foldexpr in ficklefold
Add :Eval

Add simple eval command that uses makeprg.
sub: update fastfold to get diff fix

Now it does not do anything for quick fold methods.