Fix bugs :

* QString::number use scientific format, si it's invalid for numbers > 1 000 000. We need to use v.sprintf("%d");
	* Accounts and categories where badly mapped during import
	* Fix cost not taken in account during import
	* Forbid empty account name and empty category name

ChangeLog

@@ -1,4 +1,4 @@
-v0.3 (05/05/2012)
+v0.3 (12/05/2012)
 ** User **
 	New interface in Qt4
 	Use BDD file from .local/share/kisscount
@@ -21,6 +21,8 @@ v0.3 (05/05/2012)
 	Last account/category wasn't taken in account during search
 	New users have system language set instead of English
 	Account/Category modification are immediatly reported in other panels
+	Accounts and categories where badly mapped during import
+	Fix cost not taken in account during import
 
 v0.2 (04/07/2011)
 	Remove dependancies of libsqlite and libxml