Change Boost dependency to 1.54 or above?

[Sumit Bhardwaj]

Some time back, John had asked if we can move our Boost dependency to 1.54
or above so we can use Boost::log. I wanted to check back to see if we are
at a point where we can move Boost from 1.53 which is where we have it now.

For reference, Fedora 22 shipped on May 26, 2015 with Boost version 1.58.
Fedora 26 has version 1.63 and Boost's latest version is 1.65.

Thanks,
Sumit