* Doc: Update setup documents
Use GitHub api to checkout latest release instead of "git tag" command
which cannot accurately determine prerelease tag.
Also, Changed numbered list format because
the shell command is too long to fit on one line.
* Doc: Use tab instead of spaces
* Doc: Use master branch as latest release tag
master branch and latest release is the same.
master branch merges develop branch with each latest release.
Replace the "Checkout to Latest Release" command.
Current setup document will checkout latest alpha version.
Because grep command in the document does not exclude alpha version tags.
