allow signing to create new keys when no SID given
improve readability of crypto.c
overhauled crypto functionality, now using contexts
minor fixes/cleaup for serval plugin
add more info to crypto command responses
keyring doesnt need to be set when signing
got rid of getopt; fixed specifying keyring when verifying
Merge pull request #91 from opentechinstitute/serval-improvements

Serval improvements. Tested by @jheretic.