small fixes
added ViewPager
implemented switching between categories
fixed viewpager
Merge branch 'viewpager_test' into development

Conflicts:
	res/layout/posts_lists.xml
	res/values/strings.xml
	src/com/kvest/developerslife/ui/activity/PostsListsActivity.java
	src/com/kvest/developerslife/ui/adapter/DevlifePagesAdapter.java
added link to the site