Adjusted 'internals' docs to the new organization.

Most of these changes are about using the correct vocabulary -- "core
team member" vs "core developer/committer" and adding internal links.

docs/internals/organization.txt

@@ -33,6 +33,8 @@ Until 2014, the Django Project was a benevolent_ dictatorship_.
 .. _benevolent: http://www.holovaty.com/writing/bdfls-retiring/
 .. _dictatorship: http://jacobian.org/writing/retiring-as-bdfls/
 
+.. _core-team:
+
 Core team
 =========
 
@@ -130,6 +132,8 @@ contribution in two years may be asked to move themselves to this category,
 and moved there if they don't respond. Past team members lose their privileges
 such as voting rights and commit access.
 
+.. _technical-board:
+
 Technical board
 ===============