added factory db as test fixture
custom JSON error response bodies
added version information to Wallaroo
server name now reflects version
added canonicalize/stringize to w_hash
updated web resources to use new hash api funcs
removed duplicated code
removed whitespace
Use new hash API funcs

removes code duplication in wallaroo.erl; also changes
wallaroo_hash:bitstring_to_string/1 to ...:stringize/1.
Extra logging in wwe.erl
Added validation cache
silenced some verbose logging
paper-bag fix to wallaby_graph.erl
added vcache:reset/0
wallaroo API now uses vcache
fix from demo that I missed
paper-bag fix to group resource
rb: auto-refresh special-group proxies
JSON errors for entity validation
Fixes a crash in conflict/dep validation.