Restored recursion to <index>
Fixed ref name for e.index
Cleaned up linebreak
Cleaned up comments

Logged those that still warranted notes as issues.
Removed @tpattern from dsc

Implements #369
Gave emph m.mixed.basic

Implements #370\
Removed vestigial @localtypesource from didnote
Removed unnecessary <choice>
Added @encodinganalog to parallelphysdescset

Should be on all children of <did>
Removed redundant <choice> from <namegrp>
Restored @label to <materialspec>
Restored @unit to <dimensions>
Removed @encodinganalog from physfacet

To be consistent with other children of <physdescstructured>
Fixed "indepth" to "in-depth"

No need to change from EAD 2002 practice here.
Updated m.datesingle

Replaced text with m.mixed.basic
Updated fromdate and todate w/ m.datesingle

Simplifies things a bit.
Merge remote-tracking branch 'origin/mike_post-beta_review2' into develop