Made find_package dependencies be listed on separate lines

This changes the appearance of CMakeLists.txt when you run ``catkin_create_pkg``:

Instead of:
```
find_package(catkin REQUIRED COMPONENTS ros_control ros_controllers roscpp)
```
It will now appear as:
```
find_package(catkin REQUIRED COMPONENTS
  ros_control
  ros_controllers
  roscpp
)
```

This is good because:
* Diffs will be more useful - show just the dep added/removed not the whole line
* Listing them on separate lines is common practice from my experience and will save ppl the time of splitting them up manually
* Is easier to read/scan for certain dependencies than a horizontal list.