opts hash was not being passed in to parse_epraw.

The EPRaw parsing functionality is broken. This pull request should take care of the problem.

This is the exception. 

```
irb(main):001:0> require 'paxmex'
=> true
irb(main):002:0> Paxmex.parse_epraw('path_to_file')
NameError: undefined local variable or method `opts' for Paxmex:Module
	from /Library/Ruby/Gems/2.0.0/gems/paxmex-1.0.0/lib/paxmex.rb:9:in `parse_epraw'
	from (irb):2
	from /usr/bin/irb:12:in `<main>'

paxmex.rb:9:in `parse_epraw': undefined local variable or method `opts' for Paxmex:Module (NameError)
```