Merge pull request #18 from tea/master

Fix elf32 linker
- Fixed reported bug with SSA
Merge pull request #19 from tgiphil/master

- Fixed reported bug with SSA
- Removed old Test files
- Fixed I2/U2 simulator bug
Merge pull request #20 from tgiphil/master

- Removed old test files
Fix compiler issue with enum shifts and add tests for various operations on enums; fixes redmine#44
Fix operations with enums backed by slong/ulong types