Also selecting tax_rate from si_invoice_item when getting grouped taxes for invoice
Fixed some php parse-errors

* editor just popped out some small php errors, so I corrected them
  right away
Updated Zend to latest stable
Minor style updates for cleaner look

* fixed footer for system_defaults to the right class _form
- removed overflow hidden so the buttons align propperly
Merge pull request #1 from JeroenBoersma/master

Merge JeroenBoersma fork as of 2013-09-16 (3 Fixes)
Merge pull request #2 from aleksen/master

Also selecting tax_rate from si_invoice_item when getting grouped taxes ...
Merge pull request #57 from JeroenBoersma/master

Merge with JeroenBoersma as of 2013-09-16 (3 Fixes)
removed AUTO_INCREMENT=xx in MySQL files
Roles user and viewer re-instated
TB_PREFIX substituted for si_ tables
Additional TB_PREFIX fixes and correction
Plugin Unregister button/link on Plugin Register Line fix
en_GB lang files '";//1' line ending. Multi line compute
include/sql_queries.php single SQL fix substituted
removed redundant favicon.ico - images/common/favicon.ico already exists.
Created tmp/database_backups folder for storing sql backups
Web server user may not have permission to create new folders in the tmp folder
CRLF => LF fixes, Removed all Thumbs.db
CRLF still left in library/pdf, HTMLPurifier, Zend
CRLF => LF conversion balance done
The following still have CRLF:
templates/default/css/to_delete/unused/*.css
templates/default/css/to_delete/moved/*.css
library/pdf/postscript/*.ps
library/HTMLPurifier/standalone/HTMLPurifier/ConfigSchema/schema/*.txt
library/Zend/Queue/Adapter/Db/sqlsrv.sql
library/Zend/Queue/Adapter/Db/postgresql.sql

Identified with:
find ./simpleinvoices  -not -type d -exec file "{}" ";" | grep CRLF > /root/abc.txt
Create si.log - since it may not be possible by web server user
Create php.log since the webserver user may not be able to create it