Started implementation of async IO system test.
Added examples/ folder with stubbed source files for standalone examples for various PUT/write use cases
Completed write_file_blocking example
Cleaned up example integration into build
Updated simulator integration into example client tests to hopefully fix build
Updated background start of simulator to work with Linux bash
Modified make handling of simulator to hopefully fix build testing issues
Removed shutdown of simulator from after utility test so that examples just reuse the running simulator
Implemted instant secure erase and refactored system, utility tests to simply call ISE as part of test setup
Updated release notes to include InstantSecureErase and documented availabity in client utility in README