[Beta] Fix for #71 and #137

#71
The Fix changes the "intro.js" to "introJs" while trying to import with require.js

#137
the file: "[deprectable]angular-intro.js" was changed to "angular-intro.deprectable.js"
it was added the compiled js on build folder "angular-intro.js" that does not minify and mangle the content, this way developers can use this version on their projects with their custom build

Update introJS to 2.5.0

Merge pull request #126 from millerscout/intro-js-to-2.5.0

update intro js to 2.50

Fixed a problem where the directives wasn't being properly destroyed.

Merge pull request #133 from millerscout/fix-undefined

Fix to Directives not being properly destroyed.

fixed main property on bower.json

set to "build\angular-intro.min.js" as this is the production ready library.

fix bower and package.json

• Fixed the problem where bower.json and package.json
  wasn't referencing the right file main file "src/ng-intro.component.js".

angular-intro-js as typescript.

• everything has been re-written in typescript.
• updated from jslint to tslint.
• now it's easier to track down, typos or wrong usage of methods and variables.
• it's possible to review the old code on src\[deprectable]angular-intro.js
• readme.md and plnkr pages has been updated.

fixed callbacks

when using
onchange
onbeforechange
onafterchange

it wasn't returning the targetElement.

fixed hints added by directives not showing.

• typo

Introduced ngIntroService and ngIntroDisableButton

• added ´ngIntroService´ a service that may be injected by your controller, the directive ngIntroOptions still available and it's updated to use this service.

• added ´ng-intro-disable-button´ a directive responsible to disable/enable buttons when the intro opens or closes.

v3.0.1 - intro hint fix

@tugrulelmas fixed the intro hints property