* all except pol
* pol and includes under defines
* something weird has happened
* remove own folder from include searchpath
* fixed remaining, adapted include style for external headers
* missing include
* POLLOG* macros use the new formatting
removed all old logging functions
* removed old fmt lib from everything except StreamWriter
removed unneeded functions
* fixed review comments
Adds:
- ast/Block: a block scope that allows declaring local variables
- ast/IfThenElseStatement: AST node for if..elseif..else..endif statements
- model/FlowControlLabel: provides an anchor for jumps or calls.
- Function calls, break statements, continue statements, and loops will all use these.
