Adds type shortcuts to the breeze metadatahelper.

This adds type shortcuts to the breeze metadatahelper.  Rather than having to go through and figure out the breeze datatype for each piece of metadata this allow you to define your schema more compactly:

```
helper.addTypeToStore(metadataStore, {
  name: "MyEntity"
  dataProperties: 
  {
    id: "id",
    myName: "string",
    myOtherName: { type : "string", isPartOfKey: true }
  }
}
```
Supports a few things with additional niceties:

"id" => integer that is also a key
"uuid","uid" => string that is also a key
"string" => string type
"float" => decimal type
"int" =>  integer type