Linux Binaries

This release adds the capabilities to build binaries (wheels) that work across a large range of Linux distributions to our travis-ci. This will greatly benefit everyone who had issues with source installing fastFM.

Special thanks goes to

• @zouzias for pointing us to the manylinux project,
• to @chittti for writing the manylinux based build script
• and @chezou for integrating the build script in our travis config.