If no ExposureInuAs and no Exposure, TypeError

[Ed McDonagh]

Code for extracting data from DX images looks for the current time value from ExposureInuAs and if that isn't present from Exposure. If that isn't present either, then there is a TypeError as 'NoneType' is multiplied by 1000.

There needs to be an if statement or an exception catch. The line in question is this one.

Code originally developed by @dplatten

[Ed McDonagh]

Added if statement before multiplying by 1000. Fixes #130.

→ <<cset 870912eb5a0c>>

[Ed McDonagh]

Added ref #130, #132 to the changes doc.

→ <<cset 3356be336ad6>>

[Ed McDonagh]

Fifth beta of 0.5.0. Fixed Exposure none mulitplication error ref #130, mammo export bug ref #132, DX order by DAP rather than DLP, revamp of filter information extraction in DX, added Kodak to EI list, modified DX detail view.

→ <<cset ed398981a704>>