Tell Doxygen to ignore __attribute__

Doxygen can't handle it properly (see
http://doxygen.10944.n7.nabble.com/struct-attribute-packed-not-working-td2666.html)
Merge pull request #107 from authmillenon/master

Tell Doxygen to ignore __attribute__
remove superfluous semicolons
Merge pull request #109 from mehlis/removed-semicolons

remove superfluous semicolons
merged zkasmi/makefile_fixes to master