First draft of sample widgets

Jira issue: wp-580
Updated readme files

Jira issue: wp-580
More updates to readme.md

Jira issue: wp-580
Policy manager: feature parameters
Added support for discovery feature parameters
Jira-issue: WP-484
If I enter an address of the not existing Thunderbird file - then Pzp stops with error
Jira issue: WP-637
Just cleaning up
Jira issue: WP-637
Merge branch 'master' of https://github.com/webinos/Webinos-Platform into WP-637
Still cleaning up
Jira issue: WP-637
Simplify the Windows daemon

Discovered it is possible to hide a node.exe console window using the CREATE_NO_WINDOW flag. This greatly simplifies the Windows daemon code as it no longer needs to run as a service. This also solves some security issues highlighted, namely the ability for different User Accounts to access each others PZP...

Jira issue: wp-654
Bug fix in widget server

Fixed bug where retrying the port connection fails if the port is already in use. Also bumped version numbers and copyright.

Jira issue: wp-654
Updated Windows installer

Updated and tidied up the Windows installer, removing all old commented out code. Updated webinos.js to latest version.

Jira issue: wp-654
First draft of Linux installer

This forms the structure and control files for creating the Linux installation package.
Merge pull request #402 from TobyEalden/wp-580

Create an example widget and signature guide
Merge pull request #394 from steverc/WP-484-pm-parametersSupport01

Policy manager: feature parameters
Merge pull request #403 from TobyEalden/wp-428

First draft of Linux installer
Merge pull request #401 from TobyEalden/wp-654-windows-daemon-mods

Wp 654 windows daemon mods
Merge pull request #400 from michelemorello/WP-637

If I enter an address of the not existing Thunderbird file - then Pzp stops with error
First version of sensors_actuators_driver documentation

Jira issue: WP-671
Updated sensors_actuators_driver documentation with absolute path for
images

Jira issue: WP-671
Added HTTP driver documentation for Arduino UNO board.
Fixed documentation for Arduino MEGA board.

Jira issue: WP-671