Update code to get last original code base modification from Sandeep (commit #addac2a to #aad9fc1) :

- print success on non-error advertisingStart
- initial secure characteristics on Linux
- update characteristic tests for new secure property
- initial OS X secure support (not functional due to blued issues)
- add security info to readme
- add Readme to blink(1) example folder (issue #4)
- check advertisement/scan data size
- uprev version