Make many more utility classes/headers public. (#76)

Moving these headers from src to include enables other libraries to use the
functionality provided.

* tcpsockets
* atomic_static
* raw_istream
* timestamp
* SafeThread
* Base64
* LEB128
* ConcurrentQueue

The classes have been moved into the wpi namespace as they're generic.

src/Log.cpp

@@ -61,6 +61,6 @@ static void def_log_func(unsigned int level, const char* file,
 #endif
 }
 
-Logger::Logger() : m_func(def_log_func) {}
+Logger::Logger() { SetLogger(def_log_func); }
 
 Logger::~Logger() {}