PHP 5.2 Support / Better Letter Column Sopport / Misc Bug Fixes

- make sure staticvals get set by forcing expand_eq() to evaluate the
  current cell if a forumla isn't given

- rewrite base_xls_rev() to support multi-letter columns (ex. AB)

- when doing a range lookup in X_VLOOKUP(), search for exact matches as
  well as the next smallest.  also stop the search when a valid result is
  found

PHP 5.2 Support

- replace the PHP 5.3 ternary operator shorthands (?:) with the shorthand
  compatible with prior versions of PHP

- in X_VLOOKUP(), return NULL if $index equals NULL or FALSE since prior
  to PHP 5.3 array_search() returned FALSE on failure

Code Clean-up

- move getStaticvals() so __construct() is once again the first function
  displayed
Clean Up Hackish Code
Merge branch 'triple-j-dev'

Conflicts:
	XXLS.php