Fixing pipe stderr to stdout
Using proc.communicate and adding proc.returncode
Using proc.communicate() instead of stdout.read()
Using proc.communicate() instead of stdout.read()
Adding clarification to error log
Adding clarification to error log
Changing function convert to compress

Because no conversion is done
Fixing makemkvcon call, adding disc:-1
Merge pull request #57 from JasonMillward/issue-53

Merge fix for #53 into dev