update browser
remove packages added git ignore
Update dependency on petitparser.

New petitparser has support for CDATA in XML.
Update pubspec.yaml

Fix typo: version 1.0.1 has CDATA support (1.0.0. has not).
Merge pull request #1 from marcelka/patch-1

Update dependency on petitparser.
Merge pull request #2 from matystl/master

updated versions and removed commited package files