* Added no tweak option to call to astrometry.net solver (do not solve for SIP polynomials).
* Added pyplot.ioff() to MakePSFplot() method to stop system from trying to bring up X window.
Allow MakePSFplot to specify filename for plot.
Change histogramming of FWHM bins to examine FWHM up to 9 pixels.  May need to adapt to seeing.
Change MakePSFplot method to make plot showing correlation of image radius and ellipticity.
Bug fix in plotting of image radius vs ellipticity.
Another bug fix in plotting of ellipticity vs image radius.
Bug fix of plot limits in plot of ellipticity vs image radius.
Added tel.measurement_radius to control central region which is used to determine typical FWHM.
Tweaked PSF plots to avoid error when FWHM was not yet determined but plot was run.
Merge branch 'feature/overplot_catalog' of https://github.com/joshwalawender/IQMon into feature/overplot_catalog
Changed dtypes to dtype for astropy.Table.  Keeps up with deprecation of dtypes in recent astropy update.
Fixed bug in ReadImage which loses track of fts vs fits file extension.
Merge branch 'feature/overplot_catalog' into develop