Jsx attributes that start with keyword are not handled correctly

Attempt to compile code below issues a number of errors:

``` ts
declare var React: any;
<foo class-id/>
```

```
node built\local\tsc.js  --jsx preserve ..\foo.tsx
../foo.tsx(2,11): error TS1003: Identifier expected.
../foo.tsx(2,15): error TS1109: Expression expected.
../foo.tsx(3,1): error TS1109: Expression expected.
```

Online JSX compiler handles it correctly
