String literals are being parsed, compiled and printed, read more

Strings, due to their potentially large size, are stored outside of a
routine's code section, in the data section. To access the correct
string, you must read the jump index, then the real address from the
jump table - and extra layer of indirection will result in more flexible
data down the road, I hope.

Other changes include:

* Added string concat operator ..
* Added TOY_STRING_MAX_LENGTH
* Strings can't be created or concatenated longer than the max length
* The parser will display a warning if the bucket is too small for a
  string at max length, but it will continue
* Added TOY_BUCKET_IDEAL to correspend with max string length
* The bucket now allocates an address that is 4-byte aligned
* Fixed missing entries in the parser rule table
* Corrected some failing TOY_BITNESS tests

source/toy_ast.h

@@ -45,6 +45,7 @@ typedef enum Toy_AstFlag {
 	TOY_AST_FLAG_COMPARE_GREATER_EQUAL,
 	TOY_AST_FLAG_AND,
 	TOY_AST_FLAG_OR,
+	TOY_AST_FLAG_CONCAT,
 
 	//unary flags
 	TOY_AST_FLAG_NEGATE,
@@ -108,7 +109,7 @@ typedef struct Toy_AstEnd {
 union Toy_Ast {             //32 | 64 BITNESS
 	Toy_AstType type;       //4  | 4
 	Toy_AstBlock block;     //16 | 32
-	Toy_AstValue value;     //12 | 12
+	Toy_AstValue value;     //12 | 24
 	Toy_AstUnary unary;     //12 | 16
 	Toy_AstBinary binary;   //16 | 24
 	Toy_AstGroup group;     //8  | 16