Fixed some nested function problems when accessing outer function parameters.
Major changes to handling of structs.
Initial support for unions.
Probably more...
Added initial support for CatExp aka 'a ~ b'
Fixed global constant static arrays initialized with string literals
Fixed casting any dynamic array to void*
Fixed new expression with temporary storage
Fixed alias declarations in function scope
Fixed relational comparisons of pointers
Fixed identity expression for dynamic arrays.
Revamped the system to keep track of lvalues and rvalues and their relations.
Typedef declaration now generate the custom typeinfo.
Other bugfixes.
