First stable release!

Changelog:

* Add support for FreeBSD (thanks to https://github.com/yurivict !)
* Clean old code to proper C++11
* Remove boost::thread and system dependency (use C++11 thread support)
* Add headers for boost::circular_buffer if boost isn't found on the system.

Bug fixes release

This release is mainly a bug fixes one.

The main fix is by @g0tar and fixes the "[bad packet]" error, which is mainly a compatibility issue with libpcap 1.8.0.

First public release

This is the first public release of usbtop.

It has been tested under 64-bit debian systems and is stable. It needs some testing on other Linux systems and work to be ported under Windows.

A debian package for sid/amd64 is also provided.

Feel free to test and contribute :)