Update changelog and usage docs for generating/publishing site

Author: spmallette

CHANGELOG.asciidoc

@@ -26,6 +26,7 @@ image::https://raw.githubusercontent.com/apache/tinkerpop/master/docs/static/ima
 TinkerPop 3.3.0 (Release Date: NOT OFFICIALLY RELEASED YET)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+* Moved the source for the "home page" into the repository under `/site` so that it easier to accept contributions.
 * Replaced term `REST` with `HTTP` to remove any confusion as to the design of the API.
 * Moved `gremlin-benchmark` under `gremlin-tools` module.
 * Added `gremlin-tools` and its submodule `gremlin-coverage`.

docs/src/dev/developer/development-environment.asciidoc

@@ -149,6 +149,9 @@ mvn -Dmaven.javadoc.skip=true --projects tinkergraph-gremlin test
 ** Reports are generated to the console and to `gremlin-tools/gremlin-benchmark/target/reports/benchmark`.
 * Test coverage report: `mvn clean install -Dcoverage` - note that the `install` is necessary because report aggregation is bound to that part of the lifecycle.
 ** Reports are generated to `gremlin-tools/gremlin-coverage/target/site`.
+* `cd site`
+** Generate web site locally: `bin/generate-home.sh`
+** Publish web site: `bin/publish-home.sh <username>`
 
 [[docker-integration]]
 Docker Integration