Removed dll's.
A number of small modifications:

- Removed dll's.
- Removed default.ini, which wasn't being used anymore anyway.
- Renamed Query::escapeIdentifier to Query::quoteIdentifiers and corrected
  documentation thereof.
- Session ID tokens the client provides are validated.
- Added correct shell escaping to the tiff2jpeg command.
Moved logs and cache out of web root, just like config.
Allow to specify different Controller output formats for easy debugging.
Add server URL to the censored config file.
Add getter for Entity default columns.
Fix install script for unprivileged user.
Fix deleted user behaviour.
Unfinished implementation of statistics controller.
Merge branch 'master' of https://github.com/AnnotatedBooksOnline/AnnotatedBooksOnline
Fix statistics controller for PHP 5.3
The pyramid builder also uses the new paths now.
Added a lot of transaction wrappers.
Fixed a very sneaky bug that prevented export from working when the
confirmation dialog would be shown.
Allowed the frontend escape function to also accept integers, prevented
bugs similar to the export problem.
Added frontend messages functionality.
Merge branch 'master' into temp-experimental
Fixed AnnotationsPanel.