Implemented a few features.
- Long integers (type I64), ex. 1L
- Fixed some long/int/int64_t internal representation descrepancies.
- Added len operator
- added "choose" syntax. (Java a ? b : c) (Cheshire [b if a else c]
- Fixed array accessing
- Fixed comparisons of objects.
- Added Int out of bounds compile-time check.
- Removed verbose type-checker-initializing output