Added word primitive
Changed primitive naming scheme
Fixed typechecking in word primitive
Fixed comment parsing inside of lists
Added list primitive
Fixed a pretty printing bug
Switched to alloca for calling varargs primitives
Removed unnecessary typechecking
Added sentence primitive

Aliases: se
Added fput primitive
Added support for words in fput primitive
Added placeholders for remaining data constructor primitives
Added first primitive
Renamed project to Logo
Removed nil struct in preparation for Objective-C compatibility
Removed nil struct in preparation for Objective-C compatibility
Added logo.h
Fixed some memory bugs
Fixed some bugs
Fixed some bugs