first version of cellml patches with annotations [see #20]

ready to implement special cellml procedures

first version really supporting patch annotations [see #20]

implement first cellml specific annotations [see #20]

now we have the infrastructure to go big :)

change math to be valid in annotation test doc [see #20]

added first essential cellml annotations [see #20]

so far, the following stuff gets annotated:

* spec change
* model rename
* variable def/name change
* variable del/ins/move
* component rename
* component del/mov/ins
* math change or ins/del/mov

add tests for cellml annotations [see #20]

currently tests for:

* CellmlSpec
* ChangeMath
* DelMath
* VariableDe
* VariableConcDiffers
* ComponentName
* VariableName
* no differences

check for insert math [see #20]

add detection+annotation of reaction changes [see #20]

* reaction change
* reaction del/ins
* reaction reversibility change

also added corresponding tests

implement annotation for unit changes [see #20]

* del/ins of units
* rename
* change of units

respecting global units as well as units defined locally in components

add support for variable connection annotations [see #20]

now also recognising changes in variable connections...

add support for annotation of hierarchy changes [see #20]

implement support for annotating changes in textual annotations [see #20]

releasing first official version supporting annotations [fixes #20]

update to latest bives version

this does not include annotations by default [see #20]