add structs test
add simple structure support
add early support of sturcts that is _not_ compatible with RPython
Structs progress
Remove inner functions
Structs progress
add simple tests
revert commit (checking number of values for define-values)
add RPython compatibility
add regression test for r_dict
add struct's inheritance
add struct tests for copying, update and subtypes
add struct comparisons test
4-space indent
restore RPython compatibility
Structs progress
add structs mutation test
Use number of fields instead of list of fixnums in struct type
Skip not yet working test.
refactor struct methods