New: pressed-on time duration on release

Delivers pressed-on time duration on state change from pressed to released.

Can be used through:

• polling function getLastPressedDuration()
• using callback functions - register new callback function releasedDurationCallback
• using inheritance - new method releasedDuration(unsigned long duration)

Examples are updated

Minor API change, API is not fully backwards compatible to v1.5.0

-- Mario

New: support switch-type

Handles switches with switching function:

• normally open (default)
• normally closed

Examples updated:

• using callback functions
• using inheritance

API is backwards compatible

-- Mario

New: configurable single-shot pressed-on time duration

Delivers continuous or single-shot pressed-on time duration.

Examples updated:

• using callback functions
• using inheritance

Callback functions signature changed

The input-pin number is now passed to the callback-functions

Change license to 'Apache License 2.0'

Replace license 'GNU General Public License v2.0' by 'Apache License 2.0'.

Added functionality

Get the input state by:

• using registered callback functions
• using inheritance

-- Mario

First version :)

First version to be added to the Arduino Library Manager.