src: fix typo
tests: adapt test to newer functions signatures

- Specifically _connect and _disconnect.
doc: add node installation instructions
Version 0.3.2
example: fix connect callback log
src: return after throwing an exception
src: establish context on PCSCLite constructor

- Remove SCardEstablishContext from get_card_readers.
- Initialize m_status_thread to NULL so calling PCSCLite destructor does not
  crash in case the thread has not been launched. For example when
  SCardEstablish context fails
src: add error_msg to create pretty pcsc errors
src: fix for OSs not supporting PnP Notification

- Instead of waiting for the notification, it will poll every second for a new
  card reader.
- Thanks to Ludovic Rousseau for the help.