Changes for version 0.20
- (tb) Applied Ben Bullock's patch which fixes the following: 1. JS_Init is deprecated and to be replaced by JS_NewRuntime (RT #48852) 2. line number bug in error messages (RT #57572) 3. Newline bug in error messages (RT #57617) 4. Null pointer bug in error messages. 5. spelling mistakes and grammatical errors in documentation and which adds Makefile.PL options to specify the location of the SpiderMonkey libraries. It also removes an unncessary dependency on Log::Log4Perl which is only used in debug mode.