FeedReader 3.14 beta

* Added twitter search feed
* We upgraded to new FirebirdSQL version. This version is faster and more stable.
* Fixed bug with enclosure/podcast download then using some proxy servers. Previously download progressbars were left open.
* proxy configuration to welcome dialog.
* Performance was added internaly because we eliminated some functionalities in RSS engine (Newsbrain) that were not needed in standard Feedreader.
* Added a /debug parameter that can be used to debug Feedreader in case of problems.
* Fixed some bugs with chunked download