Create version string using semantic versioning: 1.5.2-dev comes before 1.5.2

Conflicts:
	includes/functions/functions_export.php
	includes/session.php
	library/WT/Controller/Page.php
Wrong path to webtrees.js
Makefile not calculating WT_RELEASE
Fix XSS vulnerability in reportengine.php

Conflicts:
	reportengine.php
Fix: status messages do not show up in pop-up frames on the xenea theme.
Makefile - do not distinguish between dev and release builds
Validate user-selected themes
Update list of old/deleted files
Changing home/my page blocks fails for some users
HTML block - selecting default tree when there is no default tree causes fatal error
Update build script to better identify tag/branch
Don't move focus unnecessarily in date field in Chrome/IE
Unescaped name in census assistant
GM/streetview - load language text directly

Conflicts:
	modules_v3/googlemap/placehierarchy.php
	modules_v3/googlemap/places_edit.php
	modules_v3/googlemap/wt_v3_street_view.php
Batch update - name fix does not fix _HEB names
Ancestors report with children can fail when $type is undefined
Merge branch 'webtrees-base/1.4'