Fix #1946: remove an hard coded title.

The original title is copied if defined and it's sufficient for accessibility purpose.
We shouldn't force the title attribute, it's especially annoying if people are using
tooltip implementation based on the title attribute such as Bootstrap tooltip.
Fixed plural suffix for Polish translation

Now formatSelectionTooBig(3) returns "Możesz zaznaczyć najwyżej 3 element**y**" instead of "Możesz zaznaczyć najwyżej 3 element**i**"
Added padding to searching/no-results messages.

It feels just weird without paddings.
Fix CSS linear-gradient syntax

the first argument to linear-gradient is required to either be an angle, or expressed as "to [side]". Omitting the "to" keyword causes gradients to not render in IE10.
Enable nextSearchTerm function for multiple select
Add integration for symfony2

added missing integration for symfony2
"* [Symfony2](https://github.com/avocode/FormExtensions)"
Merge pull request #2006 from robertfausk/patch-1

Enhance Documentation: Add integration for symfony2
Merge pull request #2003 from jdecuyper/feature-next-search-term-multiple

Enable nextSearchTerm function for multiple select
Merge pull request #2002 from justbeez/master

Fix CSS linear-gradient syntax (gradients broken in IE10)
Merge pull request #1987 from 76200/patch-1

Fixed plural suffix for Polish translation
Merge pull request #2000 from leods92/patch-1

Added padding to searching/no-results messages.
Merge pull request #1981 from openwide-java/fix-1946-hard_coded_title

Fix #1946: remove an hard coded title attribute.
Spanish l10n improved
Lithuanian l10n improved
Latvian l10n improved
Ukrainian language code from l10n file name has been fixed:
"ua" — is country code for Ukraine.
"uk" — is code for Ukrainian language.
http://en.wikipedia.org/wiki/Ukrainian_language
http://en.wikipedia.org/wiki/Ukraine
Russian l10n improved
Ukrainian l10n improved
Polish l10n improved
Croatian l10n improved