Glassesvalidator

bump glassesTools. Now only allow newer point releases of this library to guard against backward incompatible changes
validation config internally reorganized, should work without change

- bumped glassesTools dependency
- now using get_source_directory() on Recordings to properly deal with relative paths

fix executable

Backwards-incompatible release! Any projects created with v1.x or v2.x will not load in this version.
The functionality is unchanged, but calculation of data quality for a recording is now significantly faster, and leaves less large files on the harddrive. Also some small bug fixes or functionality enhancements.
The main change under the hood is that almost all functionality has been moved to the [glassesTools](https://github.com/dcnieho/glassesTools) module, and this project is now mostly a GUI shell around that.

- adding support for Viewpointsystem VPS 19

- added support for a generic eye tracker type, allowing users to import data from any eye tracker into tools using glassesTools as long as they handle conversion to the glassesTools data format themselves. For generic eye trackers, can set the name to display in the recording info.