Third alpha release

aws_task_run(#228)

my_long_task_name->fn(my_long_task_name, my_long_task_name->arg, AWS_TASK_STATUS_LONG_ENUM);

Second alpha release

CMake packaging cleanup/fixes (#214)

* Renamed cmake modules to avoid collisions when installed, added SOVERSION and VERSION to aws-c-common

* Use GNUInstallDirs to find where to install built libraries

* PR Feedback: leave VERSION and SOVERSION up to leaf projects