Version 0.92 is backward compatible to version 0.91

Changes with respect to version 0.91:

• The library uses the latest Modelica Standard Libary (MSL) version 3.2.1 (but still works with version 3.2).
• Added a couple of convenience source blocks for Real, Integer, and Boolean signals that are similar to the blocks found in the MSL, but have as output a clocked signal.
• Added a couple of source blocks that are parametrized in terms of clock ticks rather than simulation time.
• All new blocks are utilized in at least one test.