updating version number 1.5.0

Updating to version 1.5.0 in preparation
protect where no rss tags or items

add a check before the foreach loop
admin language

minor updates to language file for english version
admin theme changed

introduce new default admin theme
rename old default to "classic"
avatar, breadcrumb updated

extra params added for user avatar and breadcrumb
new default theme

new default theme with bootstrap
rename old default theme to "classic"