c2iec

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