Created HTTP client to download whazzup text files

This is still WIP... TODOs:

* Do async read from socket and read until EOF
* Flesh out the header_to_string method
* Create a callback parameter to receive the http response
* Create response struct
* Create methods to access data about the request (e.g. headers, etc.)
Finished HTTP library; replaced boost::asio with libcurl
Created outline for Whazzup and associated classes
Filled in methods for requesting endpoints
Randomly select an endpoint
Moved algorithms to algos.h and WIP Whazzup class
Whazzup class finished except statusfile()

TODO:
Implement statusfile() [whazzup.cpp] and sanitize_url(std::string&) [algos.h]
Inserted C++ cast into unsigned int seed()
Replaced bin directory with msvc directory
Utilize Time class in clock.h
Add missing 'return' in return expressions
Fixed modified iterator problem in void HttpClient::Poll()
Removed test code
Merge branch 'feature/whazzup' into develop