MDL-21694 Moving theme strings into plugin space

diff --git a/lang/en_utf8/theme_base.php b/theme/base/lang/en_utf8/theme_base.php
similarity index 100%
rename from lang/en_utf8/theme_base.php
rename to theme/base/lang/en_utf8/theme_base.php

diff --git a/lang/en_utf8/theme_standard.php b/theme/standard/lang/en_utf8/theme_standard.php
similarity index 100%
rename from lang/en_utf8/theme_standard.php
rename to theme/standard/lang/en_utf8/theme_standard.php