Ensure bindata.go is not shown as "unstaged changes" needlessly

[vozhyk-]

This is a follow-up for #496.

bindata.go is regenerated on every make and is added to the repository. This makes it appear as "unstaged changes" after the source is built.

There are 2 ways the problem can be fixed:

• Removing the file from the repository and adding it to .gitignore (bindata.go is a generated file #496). This isn't desirable because it

  will cause 'go get' to fail since there are no post-go-get hooks that can recreate this file.

• Making the rule that regenerates the file separate from the all rule and making sure the file is regenerated and committed whenever the data changes
  • with a commit hook?