Crude restoration of searching functionality

Very basic searching is possible again. MySIAM has to be used as
storage engine for the Post table and currently only the Content
field can be searched. A

mysql> ALTER TABLE Post ADD FULLTEXT (content);

command has to be executed, before anythig works and functionality
such as ordering by date or title and pagination is currently broken.

Fixed:

The fulltext index is now generated through Silverstrupe upon rebuilding
the database (only for the content filed of posts)

The results can be sorted by date in addition to relevancy score (sorting
by title is still not possible)
Fixed Forum Pagination of search results

Some styling still required.
FEATURE tidy up of the Gravatar default images
FIX Simple ORM driven search on the database doesn't require FULLTEXT
Merge pull request #65 from camfindlay/4-setgravatar

FEATURE tidy up of the Gravatar default images
Merge pull request #64 from camfindlay/35-forumsearch

Basic forum search rolled in from another community member plus pagination fixes
Update ForumMemberProfile.php

Requirements::themedCSS needs valid filename of a css file. 
The css filename is not "forum.css", but "Forum.css"
Update ForumMember_TopicNotification.ss

The closing dot after Nickname raises an exception, so the expression must be escaped as  {$Author.Nickname}
Update Forum.php

Requirements::themedCSS needs valid filename of a css file. 
The css filename is not "forum.css", but "Forum.css"
Update ForumHolder.php

Requirements::themedCSS needs valid filename of a css file. 
The css filename is not "forum.css", but "Forum.css"
Merge pull request #66 from wwillm/patch-6

Update ForumMemberProfile.php
Merge pull request #67 from wwillm/patch-7

Update ForumMember_TopicNotification.ss
Merge pull request #68 from wwillm/patch-1

Update Forum.php
Merge pull request #69 from wwillm/patch-8

Update ForumHolder.php
Updated master strings