Merge branch 'release/v3.1.46' into develop
Update EARL10-REQUIREMENTS and EARL10-SCHEMA.
Add message when a <dfn> is re-defined.
Update biblio.js
added a bunch of dated references
Add RFC4646, "Tags for Identifying Languages"
Merge pull request #156 from mounirlamouri/patch-2

Add RFC4646, "Tags for Identifying Languages"
Merge pull request #155 from gps-git/develop

added a bunch of dated references
Merge pull request #154 from gps-git/patch-1

Update biblio.js
Merge pull request #153 from gkellogg/develop

EARL bibref and dfn re-definition
v3.1.47
Merge branch 'release/v3.1.47' into gh-pages