Update w2grid.js

Hide annoying field hints when data isn't straight text but i.e. HTML. This may speed up grid creating and viewing a little bit :)
Merge pull request #256 from fungms/patch-5

I am going to rename fieldHint -> recordTitle
Renamed show.fieldHint -> show.recordTitles and fixed a bug when displayin it.
added enum onShow, onHide, onAdd, onRemove, onItemOver, onItemOut, onItemClick
Update pl-pl.json

Updated GRID footer and toolbar texts.
Update w2grid.js

small transition.
Update w2grid.js

small transition.
Merge pull request #258 from fungms/patch-6

Update pl-pl.json
Merge pull request #259 from fungms/patch-7

Update w2grid.js
Merge pull request #260 from fungms/patch-8

Update w2grid.js
Refactored app.load() function
Added app.timer() and app.lap() functions
Remove app.ajax in favor of $.ajaxSetup() and $.ajaxError()
Recompiled JS and CSS
Update pl-pl.json

toolbar translations
Merge pull request #261 from fungms/patch-9

Update pl-pl.json
Minor bug fixes