Added a basic demo application.
Clarified that parameter values need to be referred to by their containing ParameterItem* object reference.  Will fix this later so that it works with the more intuitive @@tag@@ label.
Added scaling to the demo
Added a method to determine the object idref from the jEPlus parameter label
Changed setFixedParameterValue to use the jEPlus tag
Merge branch 'full-demo' into develop
Updated change list
Merge branch 'release-0.1.1' into develop
Merge branch 'develop' of https://github.com/keirstead-group/jeplusplus into develop