In the tests get <text:p> elements with getElementsByTagNameNS, not getElementsByTagName

Seems Firefox just ignores namespaced elements in getElementsByTagName
Merge pull request #222 from kossebau/makeTestsFirefoxCompatible

In the tests get <text:p> elements with getElementsByTagNameNS, not getElementsByTagName
Removed unused SelectionWatcher class from OdfCanvas
Merge pull request #228 from peitschie/selectionw-cleanup

Removed unused SelectionWatcher class from OdfCanvas
Add script to generate manifest.json from the scanned javascript sources.
Fix bug: readFile should be able to return strings too now.
Load classes from lib/manifest.json in an asynchroneous manner.
Do deterministic serialization of the manifest.json file.
Use updateJS.js instead of runjslint.js
updateJS.js also does the jslint tests and also updates the manifest.json files.
Better resolution of the depencencies.