* replace deprecated action bar with toolbar
* add toolbar support in each activity
* remove redundant themes made earlier
* add configure action bar method in xmpp activity
* remove android namespace from actionmodeoverlay
* solve bug of scrolling toolbar
added some white icons,
changed hardcoded icons to theme attributes,
changed icon_edit_dark to icon_edit_body to reflect icons position,
grey message bubbles in dark theme,
misc
purged ic_action_chat as it wasn't used
preference use_white_background changed to use_green_background, default true
grey chat bubbles darker, text white
replaced all grey600 with black icons and 0.54 alpha attribute
highlightColor in dark grey chat bubble now darker than background
