debug sugarsyncstore
fix storesyncthread oldestmodifieddate
Modify class DBHandler, to format logging
Modify class SugarsyncStore to improve error handling. The server (rarely) responds with status 400 BAD REQUEST, when trying to read a file, so just retry in this case.
debugging
more debugging
Add parameter --config to module main.py to allow automatic configuration closing Issue #11
    Modify function main of module main.py, to use argparse module in order to parse --config parameter and use the function start_configuration_thread
    Add function start_configuration_thread to module main.py, to start a backgroudthread waiting until the virtual file system is mounted, and finally calling function set_configuration
    Add function set_configuration to module main.py, to write the configuration file to the config/config directory, which configures the file system to a certain storage provider like Dropbox or Sugarsync
Add method is_in_progress to class StoreSyncThread, to check if a file is currently being uploaded or removed. This formerly was a private method.
Bugfix method get_file of class MultiprocessingCachingStore, to not update a file from the remote store while it is being uploaded