Properly set defaults for RADESYS and EQUINOX according to the standard in WCS object

I've tried to follow PEP7 in these guides (though I haven't gone through and done a mass conversion from 2 spaces to 4 spaces).  This does mean there should be a space after the `if`, though.

Also, not in PEP7, but a personal favorite of mine is to not omit braces on blocks (editing/merging that kind of code is very prone to errors), therefore:

```
if(strncmp(a, b, strlen(b)) == 0) {
    return 1;
}
```