Work 15: Get Argumentative

Write a function that uses strep to parse a line of arguments

First off, head over to the exec and strsep section of the notes page.
Use the following header: char ** parse_args( char * line );
It should take a string with the command line invocation of a program (like "ls -a -l")
Note that there is a " " between each argument
Return an array of pointers to each individual argument in the parameter string, that could be used for execvp()
For example, the following code should work (assuming all variables are declared appropriately:
```
char ** args = parse_args( line );
execvp(args[0], args);
```
To test this function, your program should use it on a string and then call execvp successfully.
You can make the following assumptions:
There is only 1 space between each argument in the original string
The original string contains no more than 5 arguments
The original string is correctly formatted