add ignored test

this is a problem with C90 vs C99. the test just documents the problem but does not attempt to address it
Merge branch 'master' of github.com:ckaestne/TypeChef

Conflicts:
	CParser/src/test/scala/de/fosd/typechef/parser/c/CParserTest.scala
support __builtin_nanf

Conflicts:

	CTypeChecker/src/main/scala/de/fosd/typechef/typesystem/CBuiltIn.scala
temporary hack for __real__ & __imag__

(causes some probs such as incorrect assignment with CIgnore() = CLongDouble() so still needs a real fix)

Conflicts:

	CTypeChecker/src/main/scala/de/fosd/typechef/typesystem/CExprTyping.scala
support __builtin_nanf

Conflicts:

	CTypeChecker/src/main/scala/de/fosd/typechef/typesystem/CBuiltIn.scala
temporary hack for __real__ & __imag__
(causes some probs such as incorrect assignment with CIgnore() = CLongDouble() so still needs a real fix)

Conflicts:

	CTypeChecker/src/main/scala/de/fosd/typechef/typesystem/CExprTyping.scala
Test case for complex numbers
results of __real__ and __imag__ operations are assignable
Merge branch 'beforemerge'

Conflicts:
	CTypeChecker/src/main/scala/de/fosd/typechef/typesystem/CBuiltIn.scala
	CTypeChecker/src/main/scala/de/fosd/typechef/typesystem/CExprTyping.scala