am d2136f7e: Create a shared preference setting and use it before...

am d2136f7e: Create a shared preference setting and use it before loading/unloading cache and disable cache if file operations failed in the last launch. A simple if check when reading buffer size from file

Merge commit 'd2136f7e' into eclair

* commit 'd2136f7e':
  Create a shared preference setting and use it before loading/unloading cache