Merge pull request #1 from pvorb/master

Errors are not exported.
doc comment for the exported errors object
rename LoaderError to LoaderAsyncError
add SchemaLoaderError and use it in the HTTP loader

A simplified error class that can be used by Schema Loader implementors.
the HTTP loader follows redirects and uses HTTPS when appropriate
update version to 0.1.2
add “bugs” key to package.json
remove unused require()
remove debugging code
allow passing in a schema id, instead of a schema, to the validate() function (the schema must have been previously-registered)
tests for passing a string schema id instead of a schema object to validate()
if a schema id is passed try to replace it with the actual schema

But if that’s not available, use { $ref: schemaId }.
fix search logic for isRegistered()
add tests for isRegistered
update version to 0.1.3
fix schema lookup bug that was causing issue #2
more explicit tests of “missing schema” return values
update version to 0.1.4
Merge branch 'master' of git://github.com/natesilva/jayschema