Log Message:
Update to 0.27:

v0.27 (release 2008.04.17):

USER-VISIBLE CHANGES:
- Display the actual discovery percentage when preparing to build a base.
  (Brian, Phil)
- Minor text cleanups. (Phil)
* Support events that can happen throughout the course of the game, changing
  things in interesting ways. (Brian, Phil)
* A number of new items and technologies to ease gameplay. (Brian, tweaks
  by Phil and emh)
- Building new machines informs you how much CPU capacity you will receive
  from the new systems. (Brian, Phil for suggestion)
- Idle bases are harder to discover. (Brian)
- Allow keys to be repeated when held down. (Brian, emh for suggestion)
- Fix the constant "CPU complete" dialogs when low on money. (Brian, \ 
numerous
  people for suggestion)
- Added research item for construction. Still needs actual implementation.
  Weird time code is blocking. (Brian, ? for suggestion)
- Return to base menu when exiting base screens rather than returning to map.
  (Brian, emh and Max McCracken for suggestion)
- Implemented Security and Reactor values obtained from data files. (Brian)
- Implemented "Destroy" feature from base list (Brian, Max McCracken \ 
and emh
  for suggestion)
- When building, items are sorted by their cost to make picking the best one
  easier. (Phil, Gustav Bertram for suggestion)
- Keep the game from crashing when it cannot create a 'music/' directory.
  (Phil, Andrew McMillan for report)
- Added checks to avoid key error crashes related to unfinished Construction
  code. (Brian)
- Added check to avoid crash when hitting 'Destroy' button in an empty base
  list. (Brian)
- Preferences have moved to 'prefs.dat', and now follow the standard Python
  ConfigParser format. (Phil)
- Added difficulty choice dialog handled by pgu. (Brian)
- Increased robustness across the board; E:S should be harder to crash.
  (Phil)
- Various strings shortened to fit dialogs. (Phil, Joey Hess for suggestion)
- Fixed bug that kept music from playing. (Phil, Brian Warner for suggestion)
- Keep running if the mixer can't load. (Phil, Rafal Czlonka for bug report)
- Fix up the handling of music paths. (Phil)
- Added support for win and losegame music. (emh)
* Three new tracks, 'Deprecation', 'Awakening,' and 'Inevitable,' including
  the Psycle source! (Max McCracken)
- Research screen will no longer assign an extra base to research. (emh,
  blog... for report)
- When naming base, text will take up the entire box. (emh, blog... for report)
- Fixed a potential crash with display_base_list self-recursing. (Phil,
  Josh Triplett for report)

OTHER CHANGES:
- Code cleanups and reformatting. (Phil)
- Cleanup a bug introduced in player.py, item may be int rather than object.
  (Brian)
- The music loading code is less fragile now; it shouldn't break on too-short
  file names. (Phil)
- Massive changes to data file handling; we now use Python's built-in
  ConfigParser. (Phil)
- Further changes to the data file formats, for consistency and ease of
  code/data maintenance.  (Phil)
- Switched sounds to using data files, for smoother future expansion. (Phil)
- Fixed strings loading. (Phil)