Removed code to build lexer using Flex. Left Flex input file just in case.
Adjusted inter-module references so that Xavi can be built without using Bison. The parser will only return an integer of 42, however.
Added copyright information for new parser files.
Added a basic integer parser to start the hand-written parser.
Removed Bison code to automagically determine order of operations and associativity and manually implemented them.
Eliminated left recursion from Bison-generated parser.
Added one token of look-ahead to the lexer.
Fixed a memory leak.
Left-factored numeric values in Bison grammar.
Left-factored remaining rules in grammar that needed to be left-factored for recursive-descent parser.
Made the XaviLexerPeek take NULL to ignore the value of the token.
Added a recursive descent parser by copying the code from the Bison grammar.
Removed checks for Bison and code that uses Bison. Left grammar file just in case.
Fixed some memory leaks.