Modified WidgetSpec.js to test speed value for any numeric value.
Added test to ensure that altitude is a number and that it is rounded to 1 decimal place.
Removed useless code from WidgetSpec.js.
Modified altitudeWidget tests to check for empty string and infinite numbers as well as enhance readability.
Implemented altitude rounding to 1 decimal place when it is rendered to the page
Merge pull request #22 from acuasi/18_round_altitude

18 round altitude

May include some commits relating to rounding speed (11_round_speed) as well.