Fixed typos in comments regarding realization methods.
Merge branch 'master' of https://github.com/opensim-org/opensim-core
Bug fix in the equilibrium solution of Millard and Thelen muscles, where the initial activation and fiber-length values that were always coming the default values. This was unnecessary, because unless specified otherwise, the state automatically contains the default values. When otherwise specified, e.g. from an initial states file, we want the file values to be used and that is how the generic behavior works.
Fixed a typo.
Merge pull request #272 from opensim-org/FixToMusclesToUseInitialStatesProvided

Fix to muscles to use initial states provided