Added -eagerSequence and -lazySequence.
Fix -bind: setting the correct name.
Fixed formatting and wording of docs.
Added test for eager evaluation.
Declare -lazySequence and -eagerSequence as properties, call them with dot notation.
Merge remote-tracking branch 'EnthusiasticCode/eager-sequences' (pull request #241)

Conflicts:
	ReactiveCocoaFramework/ReactiveCocoa.xcodeproj/project.pbxproj