Wire up the UDC integration test module correctly.
Add PDF manual back, fix image sizes, upgrade CodeMirror.
Merge pull request #2432 from nawroth/pdf-and-fixes

Add PDF manual back, fix image sizes, upgrade CodeMirror.
PDF: additional path to fonts so they are always found.
Merge pull request #2412 from benbc/2.0-udc-integration-test-fixes

2.0 udc integration test fixes