Add dollar to pathCompRE, which allows files with dollars in them to be served by Hydra, e.g. sphinx generated docs often has these types of files.

src/lib/Hydra/Helper/CatalystUtils.pm

@@ -181,7 +181,7 @@ sub getLatestFinishedEval {
 
 
 # Security checking of filenames.
-Readonly our $pathCompRE    => "(?:[A-Za-z0-9-\+\._][A-Za-z0-9-\+\._]*)";
+Readonly our $pathCompRE    => "(?:[A-Za-z0-9-\+\._\$][A-Za-z0-9-\+\._\$]*)";
 Readonly our $relPathRE     => "(?:$pathCompRE(?:/$pathCompRE)*)";
 Readonly our $relNameRE     => "(?:[A-Za-z0-9-][A-Za-z0-9-\.]*)";
 Readonly our $attrNameRE    => "(?:[A-Za-z_][A-Za-z0-9_]*)";