Enhance example of ::dropbox::request_token
move example of code for oauth to start of section
Enhance exemples for OAuth
Indentation change for examples
Manage dat file to store configuration data
Check if dat file is writable
Add TODO for enhancement of token check
Add underscore for reference to account_<name>
Enhance example for OAuth
Add UID to list of variables to store
Load of configuration variables from dat file during ::dropbox::init