Add clang again, but install gcc-4.7 just for the libstd++
Fix MDFunctionTest::GlobalNoArgFunction
Fix MDFunctionTest::GlobalSingleArgFunction
Fix more function tests.
Only virtual methods make sense.
No reason to test clang.
Fix MDFunctionTest::ManyDifferentFunctions.
No sense testing definitions
Fix MDFunctionTest::DuplicateDeclaration
Finish fixing MDFunctionTest
Implement parsing of functions.

Conflicts:
	opwig/src/opwig/json/reader.cxx
Save type information, in a clunky way.
Method names are no longer stored.
Odd test is odd.
Fix namespace tests.
CurrentAccess specifier is obsolete.
Testing implementation detail...
Missing current_access variable, and fix tests.

Conflicts:
	test/src/opwig/class.cc
	test/src/opwig_test.cc
Fix another test.
Fix ChildClassWithSameName.