* 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:
- model/LocalVariableScopeInfo.h
Stores, for local variable blocks:
- the names of the local variables in the block
- the "base index" of those local variables within the current scope
The code generator uses these to clean up local variables as they go out of scope.
We also need this when writing debug information.
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.
