Revert "Update repo url to ams repo and extend usage in Readme file"

This reverts commit 949bc39d0109d0f6df8ed59c450ea4741b13ab21.
Revert "Add plattform 5.1 to podspec. Remove demo subspec"

This reverts commit c0b13b1c756632aa0e63e3eaf9e7aa61ee471095.