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
Finished w2grid documentation
Small grid changes
Recompiled JS
Renamed some layout functions
Fixed small css issue in enum
Fixed grid.copy() bug
Fixed server php example to point to new libraries
Recompiled JS and CSS
Fixed layout loading overflow bug
Small CSS change
Recompiled JS and CSS