Added forms and tabs

Added a test_connection and a regex_tester form. Implemented the other
tab pages as well.
Renamed main form, added About dialog and more

I renamed the main form's source file to follow the standard convention
currently in use. Also went through and removed the maximize/minimize
window title buttons, and have enforced a static dialog size for all
windows. Finally, also modified the project settings and added a About
dialog to display technical information relating to the project.