changed parser package ParsePackage() to take prefix and updated
skip conditional as needed. Last paragraph of main package comment
was updated, along with the second to last paragraph of readme.
Due to confusion about import paths, the parser package import path
was left pointing to original repo with the hope that the author will
pull these changes. Otherwise, the import path will need to be
changed back to the forked repo to work properly.
Since a fenced code block (three backticks) is already used, there's no need to indent code blocks. Either a fenced code block or an indent alone is enough.
Also use tabs instead of spaces in Go code to make it gofmt-compatible, and use Go syntax highlighting for Go code blocks.
Unlike 1e1ffecf4f148c30fb214feeb491c7de5fe54e56, only use Go syntax highlighting for complete Go code block, since GitHub renders it poorly for partial Go code.
