Move isEmpty and isODFNode from OpRemoveText.js to OdfUtils.
Rename OdfUtils.isEmpty to OdfUtils.hasNoODFContent,
which is much more precise.
Additionally, it should return true on textNodes only if
they are children of ODF elements.
Add property mergedParagraphStyleName to OpRemoveText spec.

* Make TextController specify the mergedParagraphStyleName
when generating a RemoveText operation. No longer let
OpRemoveText decide the merge order from the context.

* Remove the text:style-name attribute on a paragraph
if the aforementioned property is an empty string.

* Add tests for this.
Convenience class for obtaining styling information for elements.
Add more documentation to StyleCache.
Remove check because element is always defined.
Fix the function description for parsing a positive number or percentage.
Remove console from jsline keywords.
Clarify class names and improve documentation.
Class names should be added to the style chain after the style name.
Bring documentation about style chain keys in line with practice.
Clearer variable names.
Also add master page to the list of parsed master pages after parsing it.
Merge pull request #473 from vandenoever/styleclass2

alternative convenience class for dealing with ODF styling information
Merge pull request #554 from adityab/removeText-dumbify

Fix paragraph merging issue and make OpRemoveText less magical
Add ability to create empty presentation and spreadsheet.
To create an empty document in odf.OdfContainer, the type of the document should be passed. If a string is passed, it is interpreted as url and an attempt is made to load a document from that url.
Merge pull request #558 from vandenoever/odp

Add ability to create empty presentation and spreadsheet.
Add ability to create odp files in the layout tests.
Only a dummy tests without checks is added so far.
Make code more readable with a isText variable.
Merge pull request #561 from vandenoever/frame03

Add ability to create odp files in the layout tests.
Clean-up unnecessary variable name and associated API dox