Fixed rendering of flags located below data series

Previously if the label was below its data point, the connecting line was drawn over the label's text.
Now the connecting line will start from the top of the label in this case.
Ryan/TomW: apply fix for rendering of line of flags located below data series in FlagsSeries.js also
Fixed Highstock regression with disappearing points for data prior to 1970 on an ordinal axis. Closes #1666.
Updated demo
Fixed regression with tooltips not showing on bar charts in IE7. Closes #1663.
Fixed issue with stacked areas containing no data. Closes #1661.
Fixed regression with minor grid lines and alternate grid bands not being hidden on axis hide. Closes #1667.
Added internationalization for the Print chart text. Closes #1656.
Fixed issue with horizontal offset for exporting context button not working. Closes #1654.
Fixed issue with area stacking. Closes #1651.
Fixed regression with pies being clipped to the plot area by default. Closes #1647.
Fixed issue with chart cursor being overwritten on chart click. Closes #1650.
Fixed issue with the first label on a datetime axis not taking a higher rank, like day format on an axis based on hours. Closes #1649.
Added new option, tooltip.followTouchMove. When this is true, the tooltip can be moved by dragging a single finger across the chart, like in Highcharts 2. When it is false, dragging a single finger is ignored by the chart, and causes the whole page to scroll. This applies only when zooming is not enabled. Closes #1644. Closes #1662.
Fixed regression with thousandsSep and decimalPoint options not being respected in the tooltip by default. Closes #1637.
Fixed typos in docs. Closes #1636.
Fixed regression with colorByPoint option in columns with negative value. Closes #1635.
Fixed Highstock issue with columns and derived series types being cut off on an ordinal axis. Closes #988.
Fixed issue with unsynchronized data grouping when one series is shorter than the other on an ordinal axis. Closes #1675.
Fixed Highstock 1.3 issue in Firefox where the page would scroll all the way up when clicking the range selector inputs. Closes #1645.