Merge pull request #24 in VECTO/vecto-cse from ~EMDIPPOMA/vecto-cse:master to master

* commit 'c7b0fcd8':
  * Handling of time steps where coordinates are constant over a certain time period (GPS accuracy issue) set gradient to 0 to avoid division by zero * Allow also non-continuous input data in *.csdat files
  * Direct start option included * Anemometer instrument calibration removed from CSE calculation * Update of definition of beta-signal (180° = air flow from front)
  * Acceleration correction true as default
  * Acceleration correction true as default
  * Control if heading and given direction is always the same * set criteria to "standard" when CSE opens * store information when switching between tabs * ResetCriteria and ImportCriteria do not clear main tab