Fixed bug # #1536 using patch #252: ad_text_to_html doesn't make a paragraph break if your two consecutive line breaks are separated by white space, e.g., you accidentally put a space character on a line by itself.
1. Added a new Tcl procedure to the content repository's library, named cr_write_content, which properly writes content to the connection regardless of RDBMS and storage type. This simplified a bunch of stuff (which explains the removed files).
2. Fixed a lot of general comments issues regarding HTML vs. Plain/Text, attachments, etc.