* #36758: refactor of navigation in app

AndroidManifest.xml

res/layout/activity_home.xml

res/layout/frag_about.xml

res/layout/frag_accounts_list.xml

res/layout/frag_call_list.xml

res/layout/frag_home.xml

res/values/arrays.xml

src/org/sflphone/adapters/AccountSelectionAdapter.java

src/org/sflphone/adapters/SectionsPagerAdapter.java

src/org/sflphone/client/ActivityHolder.java

src/org/sflphone/client/CallActivity.java

src/org/sflphone/client/HomeActivity.java

src/org/sflphone/fragments/AccountCreationFragment.java

src/org/sflphone/fragments/CallFragment.java

src/org/sflphone/fragments/CallListFragment.java

src/org/sflphone/fragments/DropActionsChoice.java

src/org/sflphone/fragments/HomeFragment.java

src/org/sflphone/fragments/IMFragment.java

src/org/sflphone/model/BubbleUser.java

src/org/sflphone/receivers/IncomingReceiver.java