- VarTransform.mo

  - implement addMultiDimReplacements to replace arrays and records 
- Inline.mo
  - bugfix for records
- Exp.mo
  - implement expStripLastIdent, is used from Vartransfrom.addMultiDimReplacements
  - extend isZero for arrays
  - simplify array_add and array_sub
- Derive.mo
  - do simplify after derive equations
  - run inline functionality after derive functions
  - bugfix derive functions 
- DAELow.mo
  - use VarTransform.addMultiDimReplacements
  - remember derived arrays and multidimequations to avoid duplicate arrays and multidimeqations
  - bugfix incidenceRowExp for array variables
  - bugfix extendRecordEqns

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@5718 f25d12d1-65f4-0310-ae8a-bbce733d8d8e