initializer-list constructor should not be declared explicit.
Constructors that take a single std::initializer_list
parameter should also omit explicit, in order to support
copy-initialization.

Clang format run on near-the-header lines.

Happy New Year

- moved ProjectData.* to Applications/ApplicationsLib
- removed Vrpn folder in DataExplorer

the element model is now updated by selecting an element in the mesh view, selection-indix parameters for various signals and methods have been unfied to unsigned