Plus a few styling enhancements.

[[Split portion of a mixed commit.]]

Temporary mainfile used to be saved to current working directory
which isn't always available for writting.
Save temporary mainfile to temporary directory.

It was broken since 2.58a and problem was caused by sysconfig
module which tried to parse python configuration header (pyconfig.h).

Use dirname(platform.__file__) to determine libpath for python.

Save as Runtime: We don't need to copy Python for OS X since on OS X the blenderplayer is built with Python already bundled in the .app folder.

- for windows use case insensitive checks for DLL and EXE extensions.
- copying python libs now works if python is installed onto the system.
- renamed 'Save As Runtime' --> 'Save As Game Engine Runtime', since 'Runtime' is too much a generic term.

initialize the filepath in the invoke function rather then the menu.

  * Now __pycache__ folders are ignored instead of *.pyc files (the only pyc files are in the __pycachce__ folders)
  * Now 2.58/python/lib is copied over instead of just lib. This allows the runtime to take advantage of Blender's "bundled Python" features. Having the 2.58 folder also allows for other potential files that BGE users might eventually want (e.g., components).

  * On OSX, copy the Python lib folder to sit alongside the .app instead of the Unix executable.

READ THIS TO AVOID A LOT OF WORK!

New way of linking to tracker pages: just use the parameter "aid" (artifact ID),
to avoid a lot of manual updates later in wiki and svn.

Example:
=========

OLD WAY TO LINK TO TRACKER
-----------------------------

Complete url of a script in Upload
http://projects.blender.org/tracker/index.php?func=detail&aid=25349&group_id=153&atid=467

If we move this in contrib this url will become
http://projects.blender.org/tracker/index.php?func=detail&aid=25349&group_id=153&atid=468
467 becomes 468, so we have to update this in wiki page.

Later on, when this moves into Trunk, the url will become
http://projects.blender.org/tracker/index.php?func=detail&aid=25349&group_id=153&atid=469
468 becomes 469, so we have to update the url in wiki page and svn.

Annoying!

NEW WAY TO LINK TO TRACKER
-----------------------------

Best way to link to tracker page is using:
http://projects.blender.org/tracker/index.php?func=detail&aid=25349

Use "func=detail"
Use "aid"            (which is the "artifact ID")

DON'T use "group_id" (which is the project ID, bf-extensions is project 153)
DON'T use "atid"     (which is the "artifacts tracker ID")

Like this, the url is unique, and we will avoid to update wiki pages and svn after moving pages
 


[[Split portion of a mixed commit.]]

  * Fixed OS X support (finds a good default path for the player and can make runtimes)
  * Enforce extensions on OS X (.app) and Windows (.exe)
  * Added Copy Python option to copy the bundled Python to the runtime directory
  * Added Overwrite 'lib' option to choose whether Copy Python will overwrite a pre-existing 'lib' directory in the runtime directory
  * Added Copy DLLs option (Win32 only) to copy DLL files from the Blender binary directory to the runtime directory
  * Cleaned up the code to handle compressed blend files.

- solved the problem I had with this addon, finally
  the addon was saving the blend as it is and in my case a compressed blend file was giving problem when played in the runtime

- hence added a bit to manage compressed blends to embedd them uncompressed

  NOTE: this should be fixed in the player itself I think, same says campbell, but worth checking

- now moved to trunk :)
  

[[Split portion of a mixed commit.]]