A new test for text with tex commands
Conditionally cycle paths

When a path ends in a NaN, it should not be cycled as it is explicitly
broken in MATLAB, but it seems that `pgfplots` does not take NaNs into
account when closing the path.
Some issue links in ACID
Fix some typos
Empty strings as `''` instead of `[]`

This is clearer as to which type everything should be. Also, in Octave
this used to raise warnings.
Extract `opts_append_userdefined`

Include user-defined options.
Extract `generateColorDefinitions`

This simplifies `saveToFile`
Fix #406: signal quiver3 as 3D plot
Use `opts_add` in `drawBarseries`
Stacked bar plots together with others
Add test `stackedBarsWithOther`
Remove quirky barplots bail-out

This seems not to be needed anymore.
In both R2014a and R2014b, the `ACID(104)` test `stackedBarsWithOther`
runs completely fine on `pgfplots 1.10`.

As such, we don't need to warn about this anymore.