Patch: PIV Card update patch

[harningt]

Attached is a gzipped patch that updates the PIV card support to work with the final-state PIV cards.

Some new files were also added in refactoring some potentially common code.

compression.c/h -- Abstract compression utility, currently supports zlib & gzip format compression methods. One of the methods permits decompression into a buffer the exact size that it needs via 'malloc'/realloc. p15card-helper.c/h -- Utility to help emulate non-filesystem cards These utilities helped in breaking down PIV support requirements so that debugging was simpler.

[harningt]

Attached is a new update to the patch, it accounts for the location of 'malloc' on OSX (stdlib.h, not malloc.h) and cleans up one of the 'hacks' that I had in place.

The data cache is now properly used by pkcs15-piv in cooperation with the p15card-helper utility.

Previously a buffer of 8k was allocated for each cert for the PKCS15 data check, now the cache is used directly for the data.

NOTE: Personalization is ignored by my update. pkcs15-piv does not allow accessing PubKeys?, since they are only accessible at personalization. Disabling access to PubKeys? also enabled pkcs11 to work properly with it, since when PubKeys? are non-existent, certs are used.. otherwise an attempt to read the PubKey? will fail and the cert is ignored.

[harningt]

NOTE: The recent update to apdu.c's chaining breaks PIV card support, so you will need to revert that change in order for PIV cards to work.

[harningt]

New PIV patch, resolves some compile problems