ROL-2039 Rename webpage to weblog_custom_template, remove template, template lang, and decorator from this table as well, remove content type from custom_template_rendition and modify the theme.xmls of the theme to have this value at the template level, not the rendition/template code one.  Note some formatting issues in the code, I'm using space-formatting while some of the older files are tab-formatted, I didn't want to reformat them as it would make my changes less clear.

git-svn-id: https://svn.apache.org/repos/asf/roller/trunk@1611984 13f79535-47bb-0310-9956-ffa450edef68