Add PMKHealthKit

Closes mxcl#920

Author: mxcl

.github/PromiseKit.podspec

@@ -152,6 +152,14 @@ Pod::Spec.new do |s|
     ss.tvos.deployment_target = '9.0'
   end
 
+  s.subspec 'HomeKit' do |ss|
+    ss.source_files = Dir['Extensions/HealthKit/Sources/*']
+    ss.dependency 'PromiseKit/CorePromise'
+    ss.frameworks = 'HealthKit'
+    ss.ios.deployment_target = '8.0'
+    ss.watchos.deployment_target = '2.0'
+  end
+
   s.subspec 'HomeKit' do |ss|
     ss.source_files = Dir['Extensions/HomeKit/Sources/*']
     ss.dependency 'PromiseKit/CorePromise'

.gitmodules

@@ -64,3 +64,6 @@
 [submodule "Extensions/HomeKit"]
 	path = Extensions/HomeKit
 	url = https://github.com/PromiseKit/HomeKit.git
+[submodule "Extensions/HealthKit"]
+	path = Extensions/HealthKit
+	url = https://github.com/PromiseKit/PMKHealthKit