[Nimble] Added beLessThan() matcher
Fixed incorrect it descriptions
[Nimble] Added beLessThanOrEqualTo(), beGreaterThan() & beGreaterThanOrEqualTo() matchers
Changed `to not` to `not to`
Reintroduced variation between `toNot` and `notTo` methods
Added ObjC support for comparison matchers
Merge branch 'comparison-matchers' of github.com:endersstocker/Quick into endersstocker-comparison-matchers

Conflicts:
	Nimble/Nimble.xcodeproj/project.pbxproj
	Nimble/Nimble/Matchers/Contain.swift
Matchers: refactor specs

Test coverage deltas for many "comparison" matcher examples were 0--that
is, no additional test coverage was gained by maintaining some examples.
Remove unneeded examples.
Matchers: add NumberComparisonMatcher

`<`, `<=`, `>`, `>=` all derive from NumberComparisonMatcher.
Matchers: move number matchers to dir