Update json/to_hash example.
Update connection test. Remove unused constant.
Converts the project CHANGELOG to Markdown.
Add note about removing support for Ruby 1.8.
Fix code examples format.
Add more details to some changelog entries.
Add changelog entry for 717080f.
Add changelog entry for aea633f.
Add changelog entry for 7cad508.
Merge pull request #135 from frodsan/update_changelog

Update changelog
Merge pull request #131 from frodsan/update_connection_test

Update connection tests. Remove unused constant.
Merge pull request #129 from frodsan/update_json_to_hash_example

Update json/to_hash example.