improved creation of .gitignore
merged branch ecdh-merge from hauke
increased minor version after merge with branch ecdh-merge
Merge branch 'ecdh-merge'
Bugfix: compare tags in constant time to prevent timing attacks (thanks to Klaus Hartke for pointing this out)
more CCM test vectors, including empty messages and different L values
Merge remote-tracking branch 'origin/master' into ecdh-merge