added android heart rate library
added HeartRate Library blank
Merge pull request #73 from Ingener74/newFeature_androidHeartRateLibrary

New feature android heart rate library
Merge branch 'master' of github.com:Ingener74/HeartRateMonitor into newFeature_fftwHeartRateRecognizer
Merge branch 'newFeature_fftwHeartRateRecognizer' of github.com:Ingener74/HeartRateMonitor into newFeature_fftwHeartRateRecognizer