parser -> preprocesser + parser

I've decided to split the module parsing into two modules, one for the
preprocessing stage which only deals with tokens and the parsing stage
which generates bytecode.

Makefile

@@ -35,7 +35,7 @@ VM_OUT=$(DIST)/ovm.out
 ## ASSEMBLY setup
 ASM_DIST=$(DIST)/asm
 ASM_SRC=asm
-ASM_CODE:=$(addprefix $(ASM_SRC)/, lexer.cpp)
+ASM_CODE:=$(addprefix $(ASM_SRC)/, lexer.cpp, preprocesser.cpp)
 ASM_OBJECTS:=$(ASM_CODE:$(ASM_SRC)/%.cpp=$(ASM_DIST)/%.o)
 ASM_DEPS:=$(ASM_OBJECTS:%.o=%.d) $(ASM_DIST)/main.d
 ASM_CFLAGS=$(CPPFLAGS)