Fix for issues #187 and #146

[tbelcheva]

Closes #187
Closes #146

[MayaKirova]

This change should also be applied to the igGridComponent and for other components that have two-way databinding (igCombo, igTree).

[MayaKirova]

Two-way databinding tests are failing. Probably because the return condition is wrong.

if (typeof this._config.dataSource === "string" || this._config.dataSource instanceof Array) {
return; 
}

We should return if the data source is not array. If it is the two-way databinding logic should execute as before.
Example:

if( !(this._config.dataSource instanceof Array) ) {
    return;
 }
this._changes = this._differ.diff(this._config.dataSource);

[kdinev]

@tbelcheva Can you include some tests for this scenario?

[kdinev]

@tbelcheva bower_components/ should be added to the .gitignore

bower_components is committed.

[mpavlinov]

@tbelcheva Please use https://www.npmjs.com/package/jquery-mockjax instead of bower

[mpavlinov]

@tbelcheva Where do you configure opts4?

[mpavlinov]

@tbelcheva Where do you configure opts2?