added HLT
first running example program: Fibonacci sequence
-refactored core operations tests
- added operations
added meta operations
no changes
-added Instruction class and its subclasses
- expression evaluation delegated to specific object
evaluation of complex expressions, as explained in TAOCP p. 153
evaluation of complex expressions, as explained in TAOCP p. 153
added assembler component and its tests (work in progress)
refactoring, changed class name
refactoring
added dependency