Refactor code. Fix some bugs.

+ Use lazy brain init.
* Move plugin code out of botlib.pm.
+ Now bot can private chatting
* Properly detect real jid if can, extract username from jid
* Change chatid generation, so all previously generated brains will be lost
+ Add !dig and !копать commands
+ Add !cat and !кис commands
* Some other minor changes

.perlcriticrc

@@ -92,3 +92,9 @@ lib_sections    = NAME | VERSION | DESCRIPTION | AUTHOR | LICENSE AND COPYRIGHT
 
 [-InputOutput::RequireBriefOpen]
 # Yes, i do!
+
+[-ControlStructures::ProhibitNegativeExpressionsInUnlessAndUntilConditions]
+# used only in botlib.pm, in this particular case it makes more clean code
+
+[-ControlStructures::ProhibitDeepNests]
+# jabber bot lib habe very nested structures that a bit fiddle to navigate :(