Resource loader minor changes. Fix for r73668 etc.

Resource loader minor changes. Fix for r73668 etc.

* Break long lines.
* Convert long or unnecessary ternary operator usages to if/else.
* Fixed excessively clever assignment expressions.
* Rename $cache to $cacheEntry.
* Removed unnecessary web invocation guards. Their perlish form was making me uncomfortable. BTW, unlike in Perl, die() is not a function, it's a special case in the PHP grammar which very roughly simulates the Perl syntax:

die "x"; // works
0 || die("x"); // works
0 || (die); // works
0 || (die "x"); // fail!