Adding support for radix in toString.
Handle parsing of octal integers.
Merge pull request #59 from zimbabao/support-redix-in-number-tostring

Adding support for radix in toString.
- Minor changes to runtime, number lib, tests
Merge pull request #60 from zimbabao/supporting-parsing-of-octals

Handle parsing of octal integers.
- Style tweaks to lexer.d
- Enabled crypto-aes in benchmark.py
- Fixed bug wrt call_prim to missing primitive