* Add relative grade, relative elevation gain data fields
* Fix wind speed conversion
* Fix percent
* Fix inverted direction in relative grade calculation
* Remove streamvalues class
* Default to 70 kg rider weight if not set
* Add additional relative grade estimation tests
* Increase default CdA value
* Additional tests
* Add relative grade to README
* ref #35: Set headwind data type fields to values according to user settings
* Use single datafield per type, add userwindSpeed data type to expose (head-)wind speed depending on user setting
* Enable minification for release builds
* Fix signed angle difference in headwind view
* Remove bitmap cache
* Format
