A function type doesn't inherit Reference anymore (it's a Value). Fixed its to_s and also added a closure? method to check if it's a closure or not (might be useful)

fix for #147, add macro identify

Added PointerAppender and use it in Base64 and Char#to_s to clean up and optimize code. Added some missing Pointer specs.

add base64

Added a spec for the Compiler class. Fixed run arguments when using its API (worked fine with options from ARGV).

Added special location pragma to lexer: #<loc:"filename",line,column> to override's a lexer's filename/line/column in the middle of tokenization (useful for ecr and other templates)