Multiple plugin imporvements and bug fixes

[mattrayner]

Description

Multiple improvements to both documentation and plugin functionality:

• Created/updated documentation for v3.0.0.
  • Added TOC via doctoc NPM package.
  • Fully documented startVuforia options object.
  • Added linked tables for methods on VuforiaPlugin.
  • Added value table for options data object.
  • Added options examples.
  • Documented stopVuforiaTrackers and startVuforiaTrackers.
• Updated package.json.
  • Added new-style dependencies (as of Cordova 6.1.0) for different versions.
• Added *-Info.plist entry in plugin.xml to auto-add new security string for camera permissions
• REVd version number to 3.0.0
• Fixed stopVuforiaTrackers and startVuforiaTrackers functionality
  • Previously, these did not function as expected. Instead of allowing the user to scan multiple images, you could only scan one.

    Motivation and Context

We needed to make a number of updates in preparation for v3.0.0. This included updates to the documentation and the Vuforia example project. When creating this example we came across a number of issues that were release blockers. They've been rolled into issues, and some have been addressed here:

• Fixes #73
• Fixes #72

  How Has This Been Tested?

Tested on an iPhone 6S running iOS 10-beta1 & a LG Nexus running Lollipop.

Types of changes

• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [X] Breaking change (fix or feature that would cause existing functionality to change)

  Checklist:

• [X] My code follows the code style of this project.
• [X] My change requires a change to the documentation.
• [X] I have read the CONTRIBUTING document.