Create nl-nl.json

Dutch locale file
Merge pull request #275 from newfield86/master

Create nl-nl.json
Small grid enhancement
Added layout.tabsShow, layout.tabsHide, layout.tabsToggle, layout.toolbarShow, layout.toolbarHide, layout.toolbarToggle methods
Recompiled JS and CSS
Fixed small PHP bug
Small bug fixes
Updated w2grid methods documentation.
Recompiled JS and CSS
Merge remote-tracking branch 'remotes/vitmalina-original/master'

Conflicts:
	dist/w2ui-dark.min.css
	dist/w2ui.min.css
	dist/w2ui.min.js