Match frame number to file name

[amclain]

Check to make sure the frame number is in the suffix of the file name, and write the metadata to each related frame. (Currently files are read by alphabetical index, which is unreliable.)

A roll.yml file like this

frames:
  - number: 1

Would match 01.tif, Roll 40 - Frame 01.tif, Roll 40 - Frame 01b.tif, etc. It should NOT match 010.tif (i.e. .*?0*<FRAME#>\D*\..+$).