Changes

Bump libraries

- https://github.com/modelica/Modelica_LinearSystems2.git branch master updated to 1a9735b7d6f2ea00c98ad46447fe10f6f5fcd359.
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/1a9735b 1a9735b] Merge pull request #77 from tobolar/fixSIunitsInDocu
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/0b34437 0b34437] Fix referencing MSL.SIunits in documentation
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/4666664 4666664] Merge branch 'master' of https://github.com/modelica/Modelica_LinearSystems2
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/c745128 c745128] Update versionDate to 2020-06-15
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/7c415a6 7c415a6] Delete version's extension "dev" (cont'd)
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/003b24e 003b24e] Delete version's extension "dev"
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/6580f73 6580f73] Merge pull request #76 from tobolar/prereleaseSteps
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/4ac26d9 4ac26d9] Move all conversion scripts into Resources/Scripts/Conversion
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/c0aee9c c0aee9c] Add annotation "obsolete"
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/3d9fbb0 3d9fbb0] Add annotation "obsolete"
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/62e3ffa 62e3ffa] Typo
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/e472cf3 e472cf3] Merge pull request #75 from tobolar/fixCallingObsoleteFunctions
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/bee609f bee609f] Clean up imports
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/4546184 4546184] Remove unused import
  * [https://github.com/modelica/Modelica_LinearSystems2/commit/95238c6 95238c6] Remove unused import

- https://github.com/SolarTherm/SolarTherm.git branch master updated to 9070496454c6bc5c13778ba5c4c550d0ce02fd81.
  * [https://github.com/SolarTherm/SolarTherm/commit/9070496 9070496] removing xlsxwritter from tests/TestNaSaltSCO2modular.py