main: error handling included, send out content-type
additional logging
activate debug logging
new testing certificate
ignore ca directory
starting sodium port
first step of migrating to sodium

using sodium code in most places. skipping some tests because problem
seems to lie somewhere in communication with test client, not in crypto
code itself. weird.
more work on migration to sodium
migration to sodium mostly done; save data as Buffers
doc update (Buffers) and small fixes
removing nacl instance
not sending padding anymore
append nonces at the end of ciphertext
removed extra (outer) nonce from message format
removed extra (inner) nonce from msg header
stop passing nonce when decrypting body
attempt to decrypt sender information
axolotl: removed unused function makeIdentity
main: code cleanup and decrypting sender info
main: cleanup and updated inline doc