ignore nonexisting pc file
only rewrite line numbers if --writePI is active
report errors on #error and #warning again
organize imports only
support for old-style parameters

int main(a,b)
   int a;
   float b;
 {
    a++;
 }

 requires to read the parameters into a map and pass them around when reading local variables from paramters and when determining the type
Merge branch 'master' into XtcIntegration

Conflicts:
	CTypeChecker/src/main/scala/de/fosd/typechef/typesystem/CDeclTyping.scala
	PartialPreprocessor/src/main/scala/de/fosd/typechef/lexer/Preprocessor.java
improved wrapper of XtcToken
massive refactoring of Token interface

only new interface LexerToken should be used outside of PartialPreprocessor
the token no longer exposes its type, but has methods as isInteger for few selected token types
debugging attempts