Enabled three ignored execute via post tests
Throw exeption when output can not be stored

If we do not do this, in case something goes wrong while storing the
output we get a response document that says process succeeded but has an
empty result.
Removed some warnings
Fixed a bug in ExecuteResponsbuilder, added tests

This should fix the bug Matthias Hinz has described about wrong mime
types beeing assigned to output data.
Use smaller tif for binary tests, renamed tests

Now a 3 KB large tif file is used instead of the old 800 KB large one.
Also, some asynchronous test were named synchronous. I changed this.
Removed old XmlSchema 1.1 dependency

XmlSchema 1.4.2 is used instead.
Adjusted waiting time for asynch execute tests

As the tiff files for binary execute tests are now much smaller, I
halved the waiting time for asynch execute tests.
Merge remote-tracking branch 'upstream/master'
Merge pull request #2 from MatthiasHinz/WPS4R

wps4r fixing calculator integration test
Merge branch 'executeresponsebuilder-bug'
Merge branch 'allexecuteposttests'
Removed duplicate method
Re-adjusted link to GPL 2.
Refactored GeoServer output generators
Added MapsServer generator
Merge pull request #17 from bpross-52n/master

Fixed a bug in ExecuteResponseBuilder, added more tests, cleaned up. 
There seems to be no discussion.
Merge branch 'WPS4R', remote-tracking branch 'origin/WPS4R' into WPS4R
fixed SosPlot R demo and extended R demo clients with links to sensor
descriptions in about page
minor fix for SosPlot R script
added .Rhistory to gitignore