c2iec

fixed type modofier mapping for types in structures

slight improvement of the type modifiers

- support typedefs
- implemented the lexer hack to identify custom types

support unnamed structs or unions

support nested structs and unions

basic support for simple structs

finalized support for switch / case

- renamed the tool to c2iec
- added rough draft to handle breaks in case statements

support for i++, not only ++i

support for loops
removed compile warnings
rudimentary (uncomplete) support for unary operators

improved unit test
support while loop
support function declaration

implemented first unit test
finished basic types and arrays

implemented basics to use multiple fifos for
different kinds of declarations, which can be collected
during parsing of functions.

first proof-of-concept for c to iec transpiler