Merge pull request #8 from ehsteve/xray

Changes to make code work on other machines
Merge pull request #10 from ehsteve/xray

Colleen's PR but fixed of conflict
Codes to plot x-ray alignment images overlaid with centers calculated by Allyn and Colleen
added code to plot xray alignment images with centers marked.
removed extraneous files
Added comments to plot_centers_for_xray_alignment_images.pro
Added more comments to plot_centers_for_xray_alignment_images.pro
Merge pull request #11 from colleenwh/master

Added code that plots X-ray alignment images with Allyn's and my centers overlaid.
added circle.pro
Merge remote-tracking branch 'colleen/master' into xray