1.1
  * Fixed: The numerical value of x_0 in the caption of figure 2.2 was
           incorrect.


1.0
  * Changed: The font size in figure 2.2 was increased to improve readability.

  * Fixed: The field in figure 2.2f was incorrectly given as 4 V/nm instead of
           8 V/nm.

  * Added: Comment on the oscillations in figure 2.2

  * Fixed: Miscellaneous typos and reformating.