Merge pull request #3669 from wagnerf42/pushups

new app : Pushups

apps/pushups/ChangeLog

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+0.1: Initial code

apps/pushups/README.md

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+# Pushups 
+
+Pushups is an exercising app with a twist : the accelerometer.
+
+![Screenshot](shot_pushups.png)
+
+I initially just wanted a pushups counter but i kind of got out of hand.
+
+The accelerometer will work on the following exercises :
+
+- pushups
+- situps
+- squats
+- jumping jacks
+
+For each of them it will try to detect two positions (for example up and down for pushups)
+and buzz on each change. You can set up a target counter for each exercise.
+
+Precision is not 100% but it's good for me and kind of increases my motivation.
+
+Other activities are time based like
+
+- plank
+- rest
+
+
+Define your training routine, set a duration and you're ready to go.
+
+
+## Creator
+
+Feel free to give me feedback : is it useful for you ? what other features would you like ?
+
+[email protected]