Introduction of curved guide

Reworked component placement such that each guide is placed relative to the previous end point, and each guide element will place an arm as its end point.

Now the instrument is constructed from moderator to sample for simplicty.

Using sample size as a given parameter is causing trouble in analysis, so this branch is not yet functional.

Plotting system updated so it no longer assumes straight guides, it works in 3D and the 2D plots are the proper projections.

Updated version system so it is available from within the package, preparing for checking version between plk file and cluster.

New example, updated documentation.