cli: global argument cleanup 

Most verbs now have a `--workspace` and `--profile` argument. I think it would be good to move these to the main `catkin` command to clean the cli documentation up. This would have effects like the following:

Instead of:

``` bash
catkin build --workspace /path/to/ws --profile debug
```

You would run:

``` bash
catkin --workspace /path/to/ws --profile debug build
```
