Updated PHEAL to version 0.1.15
Fix: Correct detection of installed https wrapper

Thx to foger for finding this and providing the fix.
CHANGE: simplify file verification

For file verification the content of .php files had been modified before
creating hashes by removing SVN keywords and replacing windows-style
lineends with unix-style;
Now hashes get created for all files without any modification to ensure
verifying all files against their exact counterparts in the repository