ENG-247, ENG-254;

ENG-247: resized logos,deleted address from Urbanity.png,removed logos and add speroteck.png logo, changed icons and added links on these blocks;
ENG-254: new arrows for slider and show these only on hover,menu elements now fixed,4 buttons in community section are in 2 rows,iphone in middle,added arrow for transition to the next section, links in communityPage's header now are correct;