Non-function update: Replace LDP namespace strings with constants

Resolves: https://www.pivotaltracker.com/story/show/65920814
Include source and JavaDoc artifacts for builds
Merge pull request #245 from bbpennel/attach-source-javadoc

Include source and JavaDoc artifacts for builds
Change file paths in org.fcrepo.kernel.spring.DefaultPropertiesLoaderTest to be platform-independent.

https://www.pivotaltracker.com/story/show/65905804
initial move of config resources to fcrepo-configs module
test resources left as is
POMs edited to include necessary test resources from fcrepo-configs
fcrepo-webapp POM modified to include fcrepo-configs as a remote resource bundle, packaging configs into the regular classes directory under WEB-INF
fixed the auth-war build, such that it runs by default and does not interfere with other builds.
Only link to inlined resources with subjects starting with "http"
Fix that double slashes would be introduced when building fcr:export URIs for the root node, fix that FedoraRepositoryExport should be chosen for fcr:export URIs (was extending from FedoraImport).

Resolves: https://www.pivotaltracker.com/story/show/60883752
Add rdf:type for primary and mixin nodetypes and their supertypes

Resolves: https://www.pivotaltracker.com/story/show/65210272
Use the cached "CONTENT_DIGEST" property (if it exists) instead of recalculating the value.