Android build error when space exists in the folder

Hi,

I'm getting an error when trying to run:

```
tns run android --emulator
```

The error seems to be related to a space in a folder within the project path.

```
'c:\Avastec' is not recognized as an internal or external command,
operable program or batch file.
```

The path is meant to be:

```
c:\avastec projects\app\
```

thanks

Steve
