Fix issues with nested properties

• Fix issues with nested properties (#19)

Support nested properties

• support nested properties (#18)

support blank in section title

• support blank in section title (#17)

support # comments

1.2.6

support # commets

Remove covertool as a test dependency

See #11.

Support Unicode and other(like dashes ) in values

Merge pull request #8 from erlcloud/readme

updates to readme with recent versions

Update Hex package

Do not include the outputs of Yecc and Leex, as this caused
problems with pre-18 versions of Erlang