Create strcpy.c

1st Quiz is :
     1. to write a c function, ex strcpy(...),  open book, open note
              write a test case as well
      2. check in to github
      3. peer review your code
      4. submit patch if find any bug

Instructions on building and running strcpy:
In bash, build with "gcc -o strcpy strcpy.c"
Run in build directory with "./strcpy [optional_string_1 optional_string_2 etc.]"

Sample output:
cravenf@ubuntu:~$ gcc -o strcpy strcpy.c
cravenf@ubuntu:~$ ./strcpy "Copy this!" "Copy that!"
Destination buffer contains "Copy this string to this destination."
Destination buffer contains "Copy this string to this destination."
Source and destination buffers overlap.
strcpy failed.
Source and destination buffers overlap.
strcpy failed.
Destination buffer contains "./strcpy"
Destination buffer contains "Copy this!"
Destination buffer contains "Copy that!"
cravenf@ubuntu:~$