Ncdc 0.5 & 0.6 update + larger user guide

...I should perhaps commit more often.

dat/ncdc-changelog

@@ -1,3 +1,25 @@
+0.6 - 2011-08-08
+  - Added file searching, through a /search command
+  - Added tab to display the search results
+  - Listen for incoming messages on UDP in active mode
+  - Allow specifying a hub address with /open
+  - Fixed case-sensitivity of shared files
+  - Various bugfixes and other improvements
+
+0.5 - 2011-08-02
+  - Downloaded files are now TTH-checked
+  - Added download queue priorities
+  - Download queue items are automatically disabled on error
+  - Improved error handling and reporting for downloads
+  - Added download_slots setting
+  - Use a separate thread to load other users' file list
+  - Improved /gc to also clean up download queue related data
+  - Decreased memory usage for large file lists
+  - Improved error handling with sendfile()
+  - Fixed downloading in passive mode on ADC hubs
+  - Fixed adding a dir to the download queue while connected to the user
+  - Fixed segfault when the userlist is open while disconnecting from a hub
+
 0.4 - 2011-07-23
 	- Added file downloading support.
 	  WARNING: Downloaded files are not TTH checked at this moment.