Clean Up Build

* Removed the Scons files
* Updated build instructions for multiple platforms
* Build PBC .h and .c files from riak_pb instead of static versions
* Updated build version to 1.0
* Addresses https://github.com/basho/riak-c-client/issues/34, https://github.com/basho/riak-c-client/issues/35 and https://github.com/basho/riak-c-client/issues/36