Allow symlinks

[eugenesvk]

I already have Velocity with a bunch of docsets and it would be a waste of space to copy them again just for your plugin.
However, when I add symlinks to the plugin docset folder I can't open the files because your plugin tries to open them in that plugin folder, not recognizing that it should redirect to the source folder instead.
/Docset/Bash.docset/Contents/Resources/Documents/bash/Looping-Constructs.html
Tried junctions, but that prevents Wox from starting (I've noticed your addon is very sensitive to folder names).