don't look for GnuTLS from cmake
remove dependency on GnuTLS for later replacement with OpenSSL
remove GnuTLS include across repo
remove more gnutls includes
put back ssize_t definition
Merge remote-tracking branch 'upstream/master'
moved _sequenceNumber to OctreeSendThread
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
moved _sequenceNumber back to OctreeQueryNode

instead added incrementSequenceNumber() to OctreeQueryNode for
sendthread to use
removed old code that was commented out

changed tabs to spaces
Merge pull request #2910 from wangyix/master

fix for skipped sequenceNumber bug in OctreeQueryNode