merge master
adds new config param, SCD config file loading mech for same
adds first pass of two-step hooks, simplifies demo, whitespaces, fixes doc code snippet to use proper message sig"
adds new hook interface for trad reg
Merge branch 'jumpios-master' into topic/new-registration

Conflicts:
	RELEASE_NOTES
	Samples/SimpleCaptureDemo/SimpleCaptureDemo.xcodeproj/project.pbxproj
	Samples/SimpleCaptureDemo/SimpleCaptureDemo/Classes/CaptureProfileViewController.m
Adds new params to config hook for reg APIs, adds flow loader, nices etag handling in Engage session manager, nices many compiler warnings, nices whitespace, constantizes constants, brings peace to the microcosm.
fixes some types, nices some warnings
fixes a bunch of warnings
merge in minor releases from master
adds reg form param to social sign-in, flow version to same
renames class cat to obey prefix convention, implements registration hooks, fixes race condition in demo UI, renames error helpers for literacy, whitespaces, improves demo profile screen UI, demo config loading
registration api works, but not yet firing correct native callbacks
fixes declaration of context param, nices names, splits reg hook implementation into request half and response half, nices warnings, adds localized description message for JRCaptureError, fixes dot path lookup handler, hooks demo up to register API
switches to prereg_fields, removes buggy manual etagging of flow, guards some input processing against exceptional conditions
updates reg hook for trad reg, fixes response parsing, -necrotic tissue, +NSNull resilience, +/- evil, adapts demo for reg feature
moves register callbacks to proper place, parameter validation, adds registration form for trad reg, updates RVC to be more lock step
whitespace
fixes test project
updates test to current config api
uses enums instead of int literals for code matching