clarify framework vs. static library
remove v4 API support
Merge branch 'develop' into release
update changelog for 1.4.0
bump podspec version
tweak changelog for deprecations
bring back & properly deprecate marker sort properties
use availability macros for better compatibility
1.4.1 bumps
Implements setting calloutContentView in RMMapLayer in order to set use it in callout view as it offers.