Update installhandler.php

Adding quotes around RewriteBase address to allow for directory names containing spaces
Remove set_option on FormUI. Replace with settings.
    By the by, success_message is stupid and should be replaced entirely with Session::notice()
Fix a typo in an htmlentities call.

Note that this reverts f2489057. That's not necessarily intentional, but we don't do that anywhere else and I suspect it was only added to "fix" the call, which was actually broken because it was typo'd.
Merge pull request #40 from haxiomic/patch-1

Allow whitespace character containing directories in RewriteBase
Fix comments overview query on admin dashboard for PostgreSQL

As comments_count was not needed in the commit changing this query, it is
dropped too.
Merge pull request #41 from Lekensteyn/fix-pgsql

Fix the Latest Comments dashboard module on Postgres installs.
Convert log data to a textual type for all schemas.

PHP handles the BYTEA (Postgres' BLOB) as a stream, rather than a string. We don't use BLOB anywhere else in our schema and we only ever write textual data to the log, so there's no reason not to change the type.

Should fix habari/habari#527, and closes pull request #42.