Fix to error message text

Changed to native English
Fixes to messu-compose.php

1. English grammar corrections
2. Changes to address delimiter which removes comma (permits semicolon
only)
Changes to default prefs for tiki-edit_article

1. Makes text float around images by default
2. Sets article to published by default
Removed categories from tiki-upload_file

Commented out sections which put category selections on the file gallery
upload page
Fixes to tiki-user_tasks

1. English grammar corrections
2. Changed priority names to be consistent with other priority settings
in Tiki
3. Fixed link in email so it would work