Remove go.mod

Only small changes

• Replace travis job with github action
• Added go module support
• Fixed period escpaing
• Added ImagePos attribute

It has been a while since a release and this contains some small fixes and updates of dependencies.

caveat: travis think this is broken

version 2.0 includes some backwards incompatible changes:

• panics have been removed and replaced with the returning of errors.
• attribute name validation has been added as has been requested multiple times.
• golint and errcheck are now applied to the build.

These backwards incompatible changes were not made lightly and only because it increases the maturity of the package.

minor bug fixes

Generated using gocc 1.0
Hand written scanner
Open Issues:

• #13
• #12
• #11
• #10
• #9
• #4