Updated How To Use (markdown)
typo
added discussion of REQUEST/GLOBAL collapser scope
add more details about fallbacks and the absence of fallbacks #699
correcting javadoc links
fixes #705
add more complex "smart" fallback observable example
More HOC equivalents; formatting consistency
`+ HOC hello world example
a handful of HOC pattern stubs
how to get the Observable form of the HystrixObservableCommand
note on HystrixObservableCommands being capable of handling Observables that emit multiple items
move HOC resumeWithFallback note to following section on fallbacks; add error propagation note
initial stub to document HystrixObservableCommand
+TOC
better formatting for Reactive section
clarify "hot"ness of Observable returned from .observe()
active voice, oxford comma, misc. editing/formatting