Change default key bit size to 2048.
Add asn1.js.
Default to 2048 bits instead of 1024.
Make probably prime number generation more robust. Addresses #75.

- Pick a witness at random from between 1 and n - 1 (for probable
  prime n).
- Base # of Miller-Rabin iterations on Handbook for Applied
  Cryptography Chapter 4 table 4.4.
Release 0.2.13.
Start 0.2.14.
Remove minified forge.
another ie10 fix...
Merge pull request #78 from fxa/master

another ie10 fix.
Release 0.2.14.
Start 0.2.15.