getProjectByUser should take no arguments in the 'Browsing' example

This fixes a bug in ```0_Browsing.py```, whereby a parameter was given to ```getProjectByUser```.  Without this, users may get the following exception:

```
Traceback (most recent call last):
  File "0_Browsing.py", line 71, in <module>
    myProjects   = myAPI.getProjectByUser('current')
  File "/Library/Python/2.7/site-packages/BaseSpacePy/api/BaseSpaceAPI.py", line 528, in getProjectByUser
    queryParams = self._validateQueryParameters(queryPars)               
  File "/Library/Python/2.7/site-packages/BaseSpacePy/api/BaseSpaceAPI.py", line 1222, in _validateQueryParameters
    raise QueryParameterException("Query parameter argument must be a QueryParameter object")
BaseSpacePy.api.BaseSpaceException.QueryParameterException: 'Error with query parameter: Query parameter argument must be a QueryParameter object'
```