Fixed problems and updated specs as suggested by thomasjo
:lipstick: Code cleanup

Two cosmetic changes:
Substituted every ' with "
All function calls have been redacted so to avoid spaces between the parens and the arguments.
Initial implementation.
Improved file name normalisation.
:lipstick: Code cleanup

Removed spaces after open parens and substituted all ' with "
Initial implementation.
First implementation.
Improved outdir detection.
Fixed PdfOpener#open to comply with new implementation of masterTexPath.
Fixed openTexMaster.