Minor updates to license text

Just wanted to give a little more credit to Laurent and make sure I
specify that there are other libraries at play that SFML relies upon.
One more minor update to license

Just wanted to include a link to all libraries used by SFML
Finished Audio Module

Finished the Audio Module, including sound recording! Also a few minor
updates.
Finished Audio Module

Apparently not everything wanted to be in the last commit. This should
take care of everything.
Network Module C Code Upload

Uploaded all the C code for the network module.
Finished Network Module

Finished writing the code for the Network Module
Window Module C Code Upload
Finished Window Module

New window module. Hopefully this work with 64bit Linux?
Update CMakeLists.txt
Update soundstream.d
Update soundrecorder.d
Update soundbufferrecorder.d
C removal

I moved the C back end to its own repository
Set up new build system
Update README.md
Update README.md
Updates, Fixes, and initial start of Unit Tests

Fixed/Updated some things in the audio module, added support for using
the sf::err output via dsfml.err module, fixed #57, and started adding
some unit tests.
Update README.md