Added tests for Utilities.pm; ra_str and dec_str tests failing
Moved functions to Utilities.pm, with tests

* Moved some functions, such as 'identical_arrays' and 'max' to Utitilies.
* Added tests for each function in Utitilities to 01_Utilities.t
* Changed prototype for some Utilities functions, and added capability to
operate on either array or reference to array.
* Removed remap function, and changed call to 'remap' to be a built-in
array dereference.  I.e., instead of @x=remap @a, @i; used @x=@a[@i].
* Also removed the equal-size constraint on remap, since it was unecessary.
* Removed some other unused functions and included libraries, like today().