Replace OpenSSL helpers with ones based on GnuTLS. GnuTLS is already an indirect
dependency since we require GLib's TLS support. As support for older protocol
versions was removed, we will not need any extra library for handling explicit
packet decryption.

This change will also resolve potential license incompatibility issues.

Implement mousepad plugin handler. The input in realized through AT-SPI.

In preparation for DBus move the files to their respective directories.

Use TCP keepalive for detecting of connection goes offline in a more
reliable manner.

Use a private library instead of rebuilding the same sources multiple times

Adding a wrapper for encryption/decryption of data packets.

Works:
- device discovery