version bump to 0.7 for new work
reworked client and pool to expose futures making it possible to use the library in a synchronous fashion. Rewrote demo to use this functionality.  Closes #18
merge pull request #25, closes issues #6 and #25
changed license to Apache 2.0, updated copyright notices. closes #27
refactored cmake files to make it easier to set compiler flags
fixed narrowing warnings in unit tests
enabled -pedantic and -Wextra.  cleaned up the resulting errors
Removed unessary string include from cql.hpp
bug fix in cql::cql_message_result_impl_t::is_null, decode size int. Also included unit test. Closes #26
added version.hpp which allows you to determine the libcql version in use, added a sub-minor (patch) number to the version string.  Closes #28.