BUGFIX: xAxisLabelHeight is set to 0 in case the option 'drawXAxis' is
set to false.
TEST: Added automated test proving the bugfix made.
TEST: Added example of range selector without the chart.
BUGFIX: Fixed typo
Merge pull request #242 from sauter-hq/draw-xaxis-bugfix

BUGFIX: RangeSelector: xAxisLabelHeight is set to 0 in case the option 'drawXAxis' is set to false.
Merge branch 'master' of github.com:danvk/dygraphs
adding comments for LONG_TICK_PLACEMENTS