Added basic INFO preference files.

Added basic INFO preference files.
Renamed PreferenceHelper -> PreferenceManager

    assets/android_preferences.info (+)
    assets/default_preferences.info (+)
    assets/linux_preferences.info   (+)
    src/util/PreferenceHelper.cpp   -> src/util/PreferenceManager.cpp
    src/util/PreferenceHelper.h     -> src/util/PreferenceManager.h
    src/util/TestPreferenceHelper.h -> src/util/TestPreferenceManager.h
Android compile fix, bad function name

Android compile fix, bad function name
I completely forgot about comitting this minor change to main.cpp
Which means that the android build has been broken during several commits.

At the same time, cleaned up a bit the initalization of the logger system.
There is no point in having to set some of these options.

    src/main.cpp
    src/util/LogManager.cpp
Extended use of preference file to GraphicsManager

Extended use of preference file to GraphicsManager
    assets/android_preferences.info
    src/core/MainManager.cpp
    src/core/MainManager.h
    src/graphics/GraphicsManager.cpp
    src/graphics/GraphicsManager.h
Fixed *_flymake.cpp being included in build

Fixed *_flymake.cpp being included in build
    src/SConscript
Moved Logger init to MainManager w/PrefFile

Moved Logger init to MainManager w/PreFile
Minor fixes:
  - If file log level set to NONE, it doesn't remove previous log file.
  - Doesn't print headers if level set to NONE

  assets/default_preferences.info
  src/core/MainManager.cpp
  src/core/MainManager.h
  src/main.cpp
  src/util/LogManager.cpp
  src/util/PreferenceManager.h
Renamed XX_prefences.info to preferences_XX.info

Renamed XX_prefences.info to preferences_XX.info
I like my preference files in alphabetical order, thankyouverymuch.

    assets/android_preferences.info -> assets/preferences_android.info
    assets/default_preferences.info -> assets/preferences_default.info
    assets/linux_preferences.info -> assets/preferences_linux.info
    src/core/MainManager.cpp
Updated SDL repo, revision ID's updated

Updated SDL repo, revision ID's updated
    README.md