Improve exception handling

Improve exception handling

Improved interface intuitivity

3.0.0

Update README.md

Independent tasks execution

Added ability to enqueue tasks(function-like objects) instead of enqueueing usual objects.

2.0.1

Minor bug fix release. Fixed race condition found in Serial queue.

execq upgrade

• redesigned library interfaces to be more stable and obvious
• added concepts of serial and concurrent queues
• IExecutionQueue::push/emplace methods returns nonblocking std::future to get result (if needed)
• queues are now cancelable

First release

v1.0.0

Extended functionality adding stream-like processing of the tasks