Composer: don't show an explicit OK when the sending has succeeded
GUI: don't show the decimal part for numbers greater than 100
GUI: fix column sizes of the message list
qmake: fix `make check` invocation

Apparently it's a problem on certain Ubuntu versions which are on the OBS
www: add a link to the OBS packages for Fedora, OpenSuSE, Debian and Ubuntu
Use the qRegisterMetaType<T>() instead of the const char * overload which is about to be deprectaed

This is obviously the preferred form even though the documentation does not
mention that in a particularly clean way.
Refactoring: moving the enums around
refactoring: better enum values
refactoring: split out the MailAddress class into an extra file
replying: towards proper "reply all", "reply list" etc
Replying: determine the recipients based on the reply mode
qmetatype: fix for namespaced classes
Use fully-qualified type names to prevent confusion of the metatype system

That's the problem of using a preprocessor which isn't fully aware of all C++
features, I guess.
Simplify
Fix warnings
Comments++
More rules for the replying
GUI: use the new replying code
docs++
Fix a bug in address formatting due to the C++ operator priority

Silly me.