pdf deflate works on cpp target
Read some more valid pdfs

- read a stream with length defined by an indirect (known or unknown)
- tolerant to spaces inserted before the end of an array.
- accept escape sequence previously considered as invalid - which exist
in real world pdfs(!)
- fix for hxcpp (try / catch issue if not wrapped between braces)
Merge pull request #14 from sledorze/master

Handles more valid PDFs and CPP support