GitLab

All example targets into 'Examples'
All the data retrieving targers into the 'Examples/Data'
All imstk libraries and uncrustify utility target into 'iMSKT'
Testing targets into 'Testing'

Expand the imstk_add_library cmake function by exposing the variables
H_FILES (headers) CPP_FILES (source) and SUBDIR_LIST (build interface
directories - the current source dir is always included).

If those values are not manually set, the previous behavior applies,
where all the files and directories in the root directory are used for
that target.

Used that new mechanism for the Rendering target to prepare for Vulkan
integration.

By adding testing source files in the same directory
than the target source files, those first ones were
included in the target executables by mistake.

Also merge Utility within Core.

Also remove headers in cmake files

Adding project name (iMSTK)

Skeleton of CMake architecture and of first few classes.