bugfix
update cell categories
partial bugfix issue #3: remove custom Widget._has_changed which is now not needed any longer;
Since Django 1.6, the previously buggy widget._has_changed method was moved to the FormField level and seems to work better.
documentation
fix django 1.6 compatibility issue in selectable package
complete bugfix against _has_changed issue
include preparation date in sample readonly forms
Introduce sampel provenance data models
admin form integration of Sample History
add provenanceType table to Index
fix dateField default value
bugfix bugfix
show location ID in default Rack unicode() (and container dialog field)
switch sourceSample in SampleProvenance to selectable field and bugfix TabularInline
rename backwards relations for SampleProvenance
bugfix tabular inline for Attachments; readonly view of sample provenance
prevent making a sample source sample of itself
bugfix SampleProvenance unicode and cleanup
method to convert generic Sample instance into specific subClass instance
optimize sample history display and make sub-class specific sample links