[ios] Split changelog out from readme

CocoaPods dings this pod for not having a separate changelog.

ios/docs/pod-README.md

@@ -2,16 +2,10 @@
 
 The Mapbox iOS SDK is an open-source framework for embedding interactive map views with scalable, customizable vector maps into Cocoa Touch applications on iOS 7.0 and above using Objective-C, Swift, or Interface Builder. It takes stylesheets that conform to the [Mapbox GL Style Specification](https://github.com/mapbox/mapbox-gl-style-spec/), applies them to vector tiles that conform to the [Mapbox Vector Tile Specification](https://github.com/mapbox/vector-tile-spec), and renders them using OpenGL.
 
-For more information, check out [our online overview](https://www.mapbox.com/ios-sdk/). 
+For more information, check out the [Mapbox iOS SDK homepage](https://www.mapbox.com/ios-sdk/) and the [full changelog](https://github.com/mapbox/mapbox-gl-native/blob/master/CHANGELOG.md) online.
 
 [![](https://raw.githubusercontent.com/mapbox/mapbox-gl-native/master/ios/screenshot.png)]()
 
-## Changes in version {{VERSION}}
-
-{{CHANGES}}
-
-See the [full changelog](https://github.com/mapbox/mapbox-gl-native/blob/master/CHANGELOG.md) online.
-
 ## Installation
 
 The Mapbox iOS SDK may be installed as either a dynamic framework or a static framework. (To reduce the download size, the static framework is omitted from some distributions; you may need to download the full package from the [release page](https://github.com/mapbox/mapbox-gl-native/releases/).)

platform/ios/scripts/package.sh

@@ -225,9 +225,6 @@ rm -rf /tmp/mbgl
 mkdir -p /tmp/mbgl/
 README=/tmp/mbgl/README.md
 cp ios/docs/pod-README.md "${README}"
-CHANGES=/tmp/mbgl/CHANGES.md
-# http://stackoverflow.com/a/4858011/4585461
-sed -n -e '/^## iOS/{' -e ':a' -e 'n' -e '/^##/q' -e 'p' -e 'ba' -e '}' CHANGELOG.md > "${CHANGES}"
 if [[ ${BUILD_DYNAMIC} == false ]]; then
     sed -i '' -e '/{{DYNAMIC}}/,/{{\/DYNAMIC}}/d' "${README}"
 fi
@@ -235,13 +232,11 @@ if [[ ${BUILD_STATIC} == false ]]; then
     sed -i '' -e '/{{STATIC}}/,/{{\/STATIC}}/d' "${README}"
 fi
 sed -i '' \
-    -e "s/{{VERSION}}/${RELEASE_VERSION}/" \
-    -e "/{{CHANGES}}/r${CHANGES}" \
-    -e 's/{{CHANGES}}//g' \
     -e '/{{DYNAMIC}}/d' -e '/{{\/DYNAMIC}}/d' \
     -e '/{{STATIC}}/d' -e '/{{\/STATIC}}/d' \
     "${README}"
 cp ${README} "${OUTPUT}"
+sed -n -e '/^## iOS/,$p' CHANGELOG.md > "${OUTPUT}/CHANGELOG.md"
 
 jazzy \
     --sdk iphonesimulator \