Fix
Fix checking for new version
Fix; improve
Fix bugs
Update docs
Add TeXSample docs
Fix docs
TeX Creator v4.0.0

* Consider processor architecture when checking application version
* Change copyright owner
* Use BeQt 4.0.0
* Use TeXSample 2.0.0
* Use Qt coding style, sort includes, class members, etc.
* Change user interface of sample widget
* Move keyboard layout switching functionality to a plugin
* Implement e-mail change confirmation