Implemented #432

Removed @linktype from am.simplelink
#401 Add @identifier to dao

Created a.identifier, added to dao, updated unitid, updated
a.access.no.normal.
#428 removed camelCase from a.link.actuate values

Implemented.
#427 created attribute specific other values

Implemented
#426 changed "otherrelation"

to "otherrelationtype"
#425 changed daotype value

From "other" to "otherdaotype"
415 otherphysdescstructuredtype update

Added "otherphysdescstructuredtype" as value for @physdescstructuredtype
and added @otherphysdescstructuredtype as an optional attribute.
#434 Added "iso639-1" to @langencoding

Implemented.
#429 Removed a.locatorLink
#430 Removed @a:id

Removed a:id attributes and a: namespace declaration
Alphabetized m.refs elements
Tidy
Alphabetized m.mixed.basic elements
Alphabetized m.mixed.basic.plus elements
Alphabetized m.mixed.basic.plus.access elements
#387

replaced NMTOKEN with "0" and "1" as values of av.zeroorone
#395

Fixed again - previous fix lost.
Tidy up and some rearrangement

No content changes
#434 Added iso639-3 value to langencoding
Merge pull request #435 from SAA-SDT/mike_post_gamma_2

Mike post gamma 2