Adding XSSL library; XSSL_accept and XSSL_connect calls finished
Adding XSSL version of echoclient/server
Updates to session key establishment (switched to EVP + pre-master secret)
Adding XSSL_read and XSSL_write API calls
Added XSSL_shutdown()
Better logging in XSSL API
Added XSSL API documentation
Removed old test file
Makefile tweak so python wrapper doesn't try to require XSSL lib
Merge branch 'develop' of github.com:XIA-Project/xia-core into develop