Added common folder, with a new string helper file.
General cleanups and conversion towards Common::FormatString
Add logging to file, and cleaned up text.h/cpp.
integer: Add a test for UXTB16
Merge pull request #13 from archshift/cleanup

General cleanup and logging to file.
Merge pull request #15 from lioncash/uxtb16

integer: Add a test for UXTB16
integer: CPU test for UXTAB16