* INSTALL: Remove.
* INSTALL.md: New.
* README: Remove remark about missing key edit interface. Update
reference to tests in QGpgME. Mention examples in tests folder. Update
URL of KDE's coding style.
* README.GIT: Remove.
* doc/HACKING: Update URL of KDE's coding style. Add information about
GPGMEPP_INTERACTOR_DEBUG variable.