artdaq

Mu2e has requested artdaq support for art v2_11_05, the s73 qualifier.

artdaq already supports the v2_11 series of art through the s67 qualifier.

I have performed basic testing as follows:

• artdaq's develop branch builds against s73 with no code changes
• All unit tests complete successfully
• The demo runs and produces data files which can be read using rawEventDump and toyDump
• art v2_11_01 (s67) can read the data file produced by s73