Merge pull request #108 from audioscience/staging

Staging
Windows build requirement is now Visual Studio 2013 or later
Merge pull request #113 from andrew-elder/master

Windows build requirement is now Visual Studio 2013 or later
Merge pull request #115 from audioscience/staging

Update background descriptor reading
Merge pull request #117 from audioscience/staging

From staging - add external port descriptors
Merge pull request #118 from andrew-elder/staging

add class for describing descriptor field names and flag names
Merge pull request #120 from andrew-elder/staging

MSVC system cleanups - fixes observed crashes
Merge pull request #119 from audioscience/staging

add string represention of descriptor fields
Changes utility class to a namespace
Utility now lies under avdecc_lib namespace
Merge pull request #122 from andrew-elder/staging

readme updates for Windows
Updated jdksavdecc-c submodule to latest master version which has only one concern now: generating and parsing avdecc packets
Merge pull request #121 from ajwlucas/staging

Replaces utility virtual class with its own namespace
Merge branch 'staging' of github.com:audioscience/avdecc-lib into staging
jdksavdecc-c submodule updated
Merge pull request #123 from jdkoftinoff/staging

Staging