[skin-module] update arrow left
UI-3483 : [skin-module] update color for button, and change arrow style
UI-3483 : [skin-module] update hover for button color
update pom version
UI-3465: update the halloween

Conflicts:
	platform-ui-skin/src/main/webapp/skin/images/Forms/arrow.png
	platform-ui-skin/src/main/webapp/skin/images/Icons/uiIconsPrimary.png
	platform-ui-skin/src/main/webapp/skin/images/SearchInput/Search.png
	platform-ui-skin/src/main/webapp/skin/images/calendar/Icons/uiIconsCalPrimary.png
	platform-ui-skin/src/main/webapp/skin/images/ecms/skin/Icons/uiIconsEcms24x24Primary.png
	platform-ui-skin/src/main/webapp/skin/images/ecms/skin/Icons/uiIconsEcmsPrimary.png
	platform-ui-skin/src/main/webapp/skin/images/ecms/skin/Publication/tickNode.png
	platform-ui-skin/src/main/webapp/skin/images/forum/portlets/answers/Icons/uiIconsAnsPrimary.png
	platform-ui-skin/src/main/webapp/skin/images/forum/portlets/forum/Icons/uiIconsForumPrimary.png
	platform-ui-skin/src/main/webapp/skin/images/platform/portlets/extensions/greetingSS.png
	platform-ui-skin/src/main/webapp/skin/images/platform/portlets/extensions/password.png
	platform-ui-skin/src/main/webapp/skin/images/platform/portlets/extensions/username.png
	platform-ui-skin/src/main/webapp/skin/images/platform/skin/Icons/uiIconsPLF24x24Primary.png
	platform-ui-skin/src/main/webapp/skin/images/platform/skin/Icons/uiIconsPLFPrimary.png
	platform-ui-skin/src/main/webapp/skin/images/social/skin/Icons/uiIconsSocPrimary.png
	platform-ui-skin/src/main/webapp/skin/images/social/skin/SpaceBox/checked.png
	platform-ui-skin/src/main/webapp/skin/images/wiki/Icons/uiIconsWikiPrimary.png
	platform-ui-skin/src/main/webapp/skin/less/variables.less
UI-3465:[Halloween] Update missing images

Conflicts:
	platform-ui-skin/src/main/webapp/skin/images/platform/portlets/homepage/calendar/calendar-porlet.png
	platform-ui-skin/src/main/webapp/skin/images/platform/portlets/homepage/gettingStarted/gettingStartedCheck.png
update wiki background bug
[halloween-theme] update images for icons