Log Message:
Update tex-pgfplots{,-doc} to 1.4.1.

Changes:
  - Added support for detached legends and detached colorbars
  - ybar (and similar plots) can now be mixed with other plot types
    like line plots.
  - improved legend formatting
  - added 'restrict x to domain*' which cups coordinates outside of a
    specified domain (same for y and z)
  - Added support for linear regression
  - Inline tables,
  - Lots of bug fixes