Add BouncyCastle PCL files
Target WP8.1 also
Merge pull request #2 from mrb113/master

Target WP 8.1 also
Release 1.7.0.1 with Wpa81 support
rename Crypto dir to crypto to match bc-git
Merge in bc-git to this repo
Convert proj back to PCL
Initial re-migration from original code
Add assm ver
Fix remaining compile errors
Add unit test files
Fix bugs from tests