Spring folder clutter

[AF]

To help clean up the spring folder while makign things more logicial I propose the following changes some of which have been suggested by other in the past but Ill list them all here:

• Move spring.exe etc into a bin folder
  This is done in various commercial game engines and would allow us to shift all the executables and dll/so libs into a single folder.
  
  As far as I am aware this would simply require a few minor changes in various installer and scons/cmake scripts, as well as the insertion of '/bin/' into a handful of strings in the lobbies and autohosts.
• Use the linux configuration files instead of the windows registry
  I cannot remember exactly but Auswaschbar may have done something with regards to this but he would have to comment on this.
  
  Eitherway all the code is already there, and doing this would allow multiple settings profiles and the associated range of new features that would be opened up to the lobby developers to implement.
• Move tasclient into tasclient folders
  TASClient pollutes the spring folder heirarchy by assuming there are no other lobbies. Spring lobby battlehub aflobby etc they all store there data in nice neat and tidy folders but tasclient adds folders here there and everywhere even in the root spring folder. TASClients config files and missions etc etc should all be moved into /lobby/tasclient/ for organisational purposes.
  
  This could be done easily with minor modifications to NSIS and a handful search and replace across the tasclient project.