Added toString() helper
Added basic searchPlugin.
Added default search callback.
Added searchResult renderer
Added styles for .htSearchResult class
Added toString() helper
Added basic searchPlugin.
Added default search callback.
Added searchResult renderer
Added styles for .htSearchResult class
Fixed search plugin tests
Added ability to set custom search result class
Merge branch 'feature/searchPlugin' of github.com:warpech/jquery-handsontable into feature/searchPlugin

Conflicts:
	src/plugins/search.js
	test/jasmine/spec/plugins/searchSpec.js
Fixed omitted conflicts in search plugin and tests
Added ability to define custom query method. The default query method interprets query as string, not as regex. The default query method is case insensitive.
Default query method returns false if query string is empty, is null, has no been specified or is not string.
Changed dimmensions and placement of copyPaste textarea. The time of pasting large data has decreased drastically.
Bugfix #1130. Fixed undoing/redoing changes in cells with validators.
Changing the mechanism of setting queryMethod, callback and searchResultClass to be more consistent.
Demo page for search plugin