Release v0.11.0 - Major upgrade of the Create mode

This release of isatools introduces a major overhaul of the pre-existing create mode for the generation of ISA documents from study design metadata. We have also introduced some (mostly) minor fixes to the core ISA API, enforcing a stricter validation on some objects.

Among the most noteworthy changes there are:

• Support of complex longitudinal study designs with the introduction of Element, Treatment, StudyCell and StudyArm classes #318, #321
• Increased flexibility of the sample and assay plans, with the introduction of the AssayGraph and the overhaul of the SampleAssayPlan class, now renamed SampleAndAssayPlan #329, #333, #296
• Increased flexibility for Quality Control support through the QualityControlService utility class
• Reworked serialization to JSON/deserialization from JSON of all the study design objects #313
• Check added when submitting quantitative Parameter Values: only numerical values are allowed #347

For more information on the known issues with this release, please check the documentation at http://isatools.readthedocs.org