Support for Fedora

Added support for compiling the broker in Fedora 20.

**Important**
Note the small change for the linking libraries part. I only removed the "-mt" part of the library name. The reason is because for newer versions of Boost (Fedora 20 employs 1.54, but it could be earlier ones too) they dropped the "-mt" naming convention eventhough the library is STILL multithreaded.

In essence, as distributions advance their Boost version, we will have to update this file here.

The same thing happened for openSUSE 12.3 and 13.1, but what I did instead was recompile the Boost libraries with the old name convention. I know better now.