* Rename and move CordaPluginRegistry to reflect its real purpose now.
* Docs: docsite improvements
* Remove discussion of webserver from 'writing a cordapp' page.
* Fixup some flow docs.
* Add a couple more package descriptions.
* Review comments - always apply default whitelist and no longer load it via ServiceLoader
* Added wording about renaming services resource file
* Improved support for testing custom schemas using a MockNetwork.
* Removed `requiredSchemas` from CordaPluginREgistry configuration
Custom schema registration now uses classpath scanning (CorDapps) and explicit registration (tests) following same mechanisms as flow registration.
* Updated following PR review feedback.
* Helper function to return Kotlin object instance fixed and moved to core InternalUtils class.
* Fixed auto-scanning Unit test to assert correct registration of custom schema.
* cleanup comment.
* Changes following rebase from master.
Re-enable code now DealState PR is in.
Add plugable JSON serialisation
Add docs for new plugin api.
Move parseCurrency back to core to prevent dependency issues with crash shell parsing.
Use :finance module as a proper CorDapp
Move parseCurrency back onto Amount companion.
Fix smoke tests
Fixup after merge.
* Added new corda and cordaRuntime configurations for cordapps to be able to explicitly depend on Corda and exclude corda dependencies from the fatjar
* Added corda integration section to docsite to describe how to integrate with Corda.
* Updated more of the documentation to reflect the new method of specifying core corda dependencies.
* Reorganised document logic to move all build system related documentation to the cordapp build systems page.
* Renamed cordapp build systems doc to match actual purpose.
* Improved the warning for building against a net.corda dependency in a cordapp
* Added a line of dialogue to show further reading for those reading about writing cordapps.
