Chip input two way binding support with array

Support two way binding with chip input

Support usage of chip input using simple array

-Allow usage of chip input using simple array
-Bug fixes
-Readme updates

ngx-at-chip-input-v0.0.3

Support Disabling of chip input through formControl.
Support custom placeholder.

ngx-at-chip-input-v0.0.1

This is the first release of ngx-at-chip-input.

Functionality supported.

• Ability to add and remove chips
• Ability to be used as a reactive form control