* Adds the ability for destination plugins to be sub-classed from ExportDestination. These plugins have the extra option of specifying an export plugin before the destination receives the data. Closes#807.
* fixing tests
* Adds additional constraints to the max notification time. With an increasing number of certificates we need to limit the max notification time to reduce the number of certificates that need to be analyzed for notification eligibility.
* Allowing that create_csr can be called with an additional flag in the csr_config to adjust the BasicConstraints for a CA.
* If there are no SANs, skip adding a blank list of SANs.
* Adding handling for all the extended key usage, key usage, and subject key identifier extensions.
* Fixing lint checks. I was overly verbose.
* This implements marshalling of the certificate extensions into x509 ExtensionType objects in the schema validation code.
* Will create x509 ExtensionType objects in the schema validation stage
* Allows errors parsing incoming options to bubble up to the requestor as ValidationErrors.
* Cleans up create_csr a lot in the certificates/service.py
* Makes BasicConstraints _just another extension_, rather than a hard-coded one
* Adds BasicConstraints option for path_length to the UI for creating an authority
* Removes SAN types which cannot be handled from the UI for authorities and certificates.
* Fixes Certificate() object model so that it doesn't just hard-code only SAN records in the extensions property and actually returns the extensions how you expect to see them. Since Lemur is focused on using these data in the "CSR" phase of things, extensions that don't get populated until signing will be in dict() form.* Trying out schema validation of extensions
* Aligning certificate creation between authority and certificate workflows
* Correctly missing and mis-named fields in schemas
* Re-ordering KeyUsage and ExtendedKeyUsage for consistency and clarity
* Adding client authentication to the authority options.
* Missing blank lines for pyflakes linting
* Updating tests for new fields/names/typos
* is_critical wasn't in the schema, so was getting dropped.
* isCritical in the Javascript wasn't getting assigned if it was unchecked. Now, it will be assumed false if missing.
* The display of critical or not in the list of added custom OIDs was unclear when it was just true/false with no heading. Now it will be displayed as critical or nothing instead.
* The namespace for the checkbox for isCritical was wrong, and didn't get processed with the oid/type/value variables.
* Combining Authority Key Identifier extension options in the schema.
This makes processing them in the cert/csr generation stage make more sense because they are two options in the same x.509 extension. They were already in the same part of the schema for authorities, but this makes the certificates follow the same pattern, and it allows them to share the same schema/validation layout.
* Updating schema tests to match changes
* Fixing an idiot typo
* I promise to stop using Travis as a typo-corrector soon.
