Bug fixes, minor enhancements, and document cleanup

Bug fixes:

1. #172: Unexpected behavior with co_reduce
   • A bug when the value attribute was present for binary operator functions passed to co_reduce is now resolved
2. #340: Set saner/safer/smarter permissions for installed caf and cafrun scripts, now 0555
3. Replaced less portable #!/usr/bin/bash shebang with more portable #!/usr/bin/env bash shebang for caf and cafrun scripts.
4. #352: The caf compiler wrapper script did not accept the --wrapping flag, even though it was listed in the --help documentation.
5. #356: GCC's download-prerequisites script was not working on Mac OS due to different names of checksum programs (md5 and SHA). The opencoarrays install script will now patch this script so that it won't fail when checking the GCC checksums. A patch was also submitted to GCC to remedy the issue.

Enhancements

1. Update github repository name from opencoarrays to OpenCoarrays
2. co_reduce can now operate on character arrays
3. STATUS.md was deleted since it was difficult to maintain and frequently out of date. Check the issues page for the latest status information, as well as the status badges at the top of the README.md file
4. Issue and pull request templates added, but are currently too verbose and need further editing and refinement.

Installation

Please see the installation instructions for more details on how to build and install this version of OpenCoarrays

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