Add configuration of gcov for coverage testing.
Adding Yawot API defines to control symbol export.
Adding memcheck testing option.  Set YAWOT_ENABLE_MEMCHECK of MEMCHECK on the command line to enable.  Setting the version to 0.0.0 for the develop branch, it should not have a version.
Merge pull request #2 from hsorby/develop

Setting up development process
"Setting version number for release"