- Drop unneeded qt-creator-rpmlintrc

- update to 2.3.0 (final)
General
* Redesigned the Welcome page to allow searching through examples with
descriptions
* Fixed Output panes so that they are minimized to their previous size
* Added support for building with the Clang compiler
Editing
* Fixed lock up when regular expression search matched empty line
* Completions are now computed in a separate thread (non-blocking editor)
Managing Projects
Debugging
* Color memory display highlighting the variables in stack layout
* Correct source location for breakpoints in CDB using code model
(QTCREATORBUG-2317)
* Added support for multiple breakpoints from one location
(covering constructors, destructors, template functions, and so on)
* Added a custom dumper for QXmlAttributes, Eigen::Matrix
* Added the option to set data breakpoints on either an address or expression
* Added a framework to modify strings, vectors, and so on, during debugging
* Added an option to stop on qWarning
* Renamed "Locals and Watchers" as "Locals and Expressions"
* Renamed "Watchpoint" as "Data Breakpoints"
* Made original values of automatically dereferenced pointers accessible
* Improved the "Add Breakpoint" dialog
* Improved the displaying of enums (included numeric value)
* Improved the speed of the QVariant dumper
* Improved the handling of shadowed local variables
* Fixed object expansion in tooltip