-Added threading library.
Currently only functional for Linux; Windows will fail to link. (I will fix this soon.)
-Fixed missing move and copy constructors in List and ForwardList
-Fixed broken move constructor in HashMap
-Fixed missing const get() in HashMap
-Fixed broken operator-> in ListIterator
-Added sprawl::noncopyable
-Added sketch headers for filesystem library
-Made StringLiteral hashable, added special hashes for pointers and integers in murmur3
-Fixed compiler warning in async_network
-Updated memory allocators to use new threading library for mutexes
-Added accessibility to sprawl::StringLiteral to be able toa ccess its pointer and length and perform pointer comparisons