Script release creation

[martintosney]

Spun off from issue #12

The release creation/upload is quite manual at the moment. In #12 I created I accidentally forgot to specify the target release option.

I propose one, maybe two, enhancement(s):

1. Create a shell script in the project to run the Bob makei command with our desired arguments (e.g. TGTRLS=V7R3M0).

2. Optionally, a second script that uses the Github API to create the release and upload the save file.

[martintosney]

Found that the developer working on Bob actually has something very similar. We could probably adapt it quite easily:

https://github.com/TongkunZhang/bob-release-tools

[martintosney]

Note to self - current manual build instructions:

• Clear library REPLBOB (since that's what our bash script currently relies upon)
• Run the build with makei build -t 'all package' -o TGTRLS=V7R3M0
• sftp to the machine to transfer the save file locally (get /QSYS.LIB/REPLBOB.LIB/RPGLEREPL.FILE)
• Create a new release through the Github UI and tag the new release
• Attach the save file manually to the release in the browser