Fixed issue where <a> tags were left without any attributes when a link was removed.
(Did not change link type to add "tel:" but it's showing in my diff for some reason.)
Merge pull request #102 from hgezim/wysihtml5

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...was removed.

(Did not change link type to add "tel:" but its showing in my diff for some reason.)
Extend previous commit for consistency. Links with empty href attributes should not be inserted.
Dialog form _serialize should not apply properties to element (not expected behaviour)
Update insert image command.