Updating PR template, doc links to PR info

.github/PULL_REQUEST_TEMPLATE

@@ -1,19 +1,29 @@
-[Remove this and add a short summary line]:
 
-- Developer(s):
-
-- Please suggest code Pull Request reviewers in the column at right.
-
-- Are the code changes bit for bit, different at roundoff level, or more substantial?
-
-- Please include the link to test results or paste the summary block from the bottom of the testing output below.
-
-- Does this PR create or have dependencies on Icepack or any other models? 
-
-- Is the documentation being updated with this PR? (Y/N)
-If not, does the documentation need to be updated separately at a later time? (Y/N)
-
-Note: "Documentation" includes information on the wiki and .rst files in doc/source/, 
-which are used to create the online technical docs at https://readthedocs.org/projects/cice-consortium-cice/.
-
-- Other Relevant Details:
+For detailed information about submitting Pull Requests (PRs) to the CICE-Consortium,
+please refer to: <https://github.com/CICE-Consortium/About-Us/wiki/Resource-Index#information-for-developers>
+
+
+## PR checklist
+- [ ] Short (1 sentence) summary of your PR: 
+    ENTER INFORMATION HERE
+- [ ] Developer(s): 
+    ENTER INFORMATION HERE
+- [ ] Suggest PR reviewers from list in the column to the right.
+- [ ] Please copy the PR test results link or provide a summary of testing completed below.
+    ENTER INFORMATION HERE 
+- How much do the PR code changes differ from the unmodified code? 
+    - [ ] bit for bit
+    - [ ] different at roundoff level
+    - [ ] more substantial 
+- Does this PR create or have dependencies on Icepack or any other models?
+    - [ ] Yes
+    - [ ] No
+- Does this PR add any new test cases?
+    - [ ] Yes
+    - [ ] No
+- Is the documentation being updated? ("Documentation" includes information on the wiki or in the .rst files from doc/source/, which are used to create the online technical docs at https://readthedocs.org/projects/cice-consortium-cice/.)
+    - [ ] Yes
+    - [ ] No, does the documentation need to be updated at a later time?
+        - [ ] Yes
+        - [ ] No 
+- [ ] Please provide any additional information or relevant details below:

doc/source/developer_guide/dg_about.rst

@@ -16,3 +16,14 @@ Guiding principles for the creation of CICE include the following:
     on individual gridcells, and contain no underlying infrastructure.  CICE must call
     into Icepack using interfaces and approaches specified by Icepack.
 
+
+Git workflow and Pull Requests
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+There is extensive Information for Developers documentation available.
+See https://github.com/CICE-Consortium/About-Us/wiki/Resource-Index#information-for-developers
+for information on:
+  - Contributing to model development
+  - Software development practices guide
+  - git Workflow Guide - including extensive information about the Pull Request process and requirements
+  - Documentation Workflow Guide