Merge pull request nextras#28 from Ivorius/app3.0.3

Fix compatibility with nette/application 3.0.3

readme: update badge and description

signalReceived: convert value to a correct type

readme: typo

opened 1.3 branch

token: bind it to session id [closes nextras#8]

Changed structure to PSR-4

Merge pull request nextras#4 from fprochazka/bug/manual-signal-links

Fixed manually created signals links

Updated README

Fixed secured signals in ajax. (It doesn't require redirect now)