Revert part of 6e255a9503a3424c7e2d20f61c367a6d0c2b2b5e

Build fat binaries i386, Chrome is still 32 bit only
Merge pull request #257 from zomps/mac_enable_i386

Revert part of 6e255a9503a3424c7e2d20f61c367a6d0c2b2b5e

This allows plugins running in Chrome (32bit) to use OpenSC PKCS#11, which would otherwise be only 64bit. Tokend "hides" the cpu architecture issue otherwise.
Reduce indicated maximum PIN length to 15 to support more PIN pad readers

Fix bogus minimum PIN length