Added return to record start button.
Moved the selection box and clear data buttons to the RIGHT_TOP instead of TOP_RIGHT
Start disables pause.
Heatmap comment
Function to check if an input is a number.
Add button for speed control.
Added speedFactor resets to end of file pause and return to start.
Reset ajax errorCount on successful getMarkers.
Report errorCount on error, and increased threshold to 10 errors.