VESPERS: Automatically set the path of the CCD's when they connect.  The methods do nothing if the there was no proposal number given.  Part of #490 but still needs some testing
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VESPERS: Added a verbose check on whether a file exists before acquiring with CCD detectors.  This is to prevent accidental overwriting of CCD images when using the detector for single images.  Part of #489.  Also did some minor code cleanup for ease of readibility.
Merge branch 'master' of github.com:acquaman/acquaman