* ENT-2298: CE Hello World Tutorial Page references Corda V1.0
Removed version number completely from text, I thought this made more sense than hardcoding a version which will almost immediately be out of date.
* ENT-2302: Hello World Tutorial Page mismatch between code sample and explanatory text
Updated text to proper method
* ENT-2305: Java Instructions to Invoke Hello World CordApp fail
Removed Java instructions
* Updates tutorial to make imports to be added clearer, and to reflect new repo structure.
* Adds links to the solution repos for tut 1.
* Further fixes based on dry-run.
* Remove node's main identitiy from NodeInfo.
Preparation for getting rid of services + supporting multiple identities
on the node.
NodeInfo keeps multiple identities as a list. For now the first one is treated as a special one.
Introduced function chooseIdentity in CoreTestUtils as a preparation for proper handling of multiple identities in the future.
Remove legalIdentityKey from ServiceHub, add extension function - chooseIdentity on ServiceHub.
Add `me` field on FlowStateMachineImplemetation, flows should know what the calling identity is.
Remove SERVICES_PREFIX in artemis messaging layer.
* Address minor comments.
* Fixes after rebase.
Remove chooseIdentity from ServiceHub
* Rename me to ourIdentity on FlowLogic
* Fixes after rebase
* Address Ross comments, fixes
* Fix after rebase
* Fix services certificate paths
Apply Patrick's patch.
