Remove old no longer used build target "zip"
install wodo.texteditor code files separated in zip subdir wodotexteditor/

also no longer install wodo.texteditor-only ones in programs/editor
Add parameter to zipdir.js for setting a path prefix to zip entries
Use an unversioned directory to collect the files for wodotexteditor zip

(helps testing as the url to browse to in the build dir does not change all the time)
Merge pull request #683 from kossebau/removeOldZipTarget

Remove old zip target, cleanup mess in wodo.texteditor zip, collect wodotexteditor files in stable build url
Remove previous version of android app.
Add cordova app for viewing ODF files

This app works on firefox os and android. It will replace the android
app in programs/android.
The user interface has been rewritten and much simpler than the previous
one.
Make app target naming consistent with other product targets.
Also do not build them by default.
Install cordova in the top level node_modules directory
instead of creating a separate node_modules folder in programs/cordova.