Tracking 1.0.0 release

[fiznool]

• Move package to new name ng-elastic
• Ensure PR Performance improvements #13 fixes the necessary issues
• Support Angular Universal doesn't work with universal #14
• Support custom setting of height on initialisation if input field is empty How to set default height on initialization? #12
• Test with Angular 2 & 4
• Test with Ionic 2 & 3
• Update Angular & Ionic demo repos
• Update plunker demo
• Add migration guide from angular2-elastic -> ng-elastic