Use proper external storage directories

What steps will reproduce the problem?
1. Install the app
2. Browse your sources
3. Check the sd card there is a directory in the root named xbmc with cached 
data underneath, presumably images

What is the expected output? What do you see instead?
Per the android documentation
http://developer.android.com/guide/topics/data/data-storage.html#filesExternal

Permanent data should be stored in
/sdcard/Android/data/org.xbmc.android.remote/files

Cached data like images and thumbnails should be stored under
/sdcard/Android/data/org.xbmc.android.remote/cache

What version of XBMC Remote are you using?
v0.8.5-beta1 r730

Which Android device are you using (and which ROM, if custom)?
Froyo

Which XBMC revision are you running and on which platform?
XBMC PRE-10.0 Git:4b032be

Please provide any additional information below.
The advantage is when the app is un-installed all its data will be deleted by 
android so users don't have to clean up their sd card.

Original issue reported on code.google.com by adam.ty...@gmail.com on 25 Feb 2011 at 7:31

Merged into: #261

bigdaddydad / android-xbmcremote

Use proper external storage directories #488