Shortcircuit to help dedent.
Misleading comment
Less magic in path handling.
Empty dictionaries prevent hidden errors.
Syntax simplification
Avoid writing into parameters.
Only return metadata that has values.
Make 'get_meta' handle all metadata cases.
No metadata means no key, not empty string.
Further cleanup of the metadata fragments.
Typo in destination building.
Read the right file to get the metadata.
Meta files should discard the extension first.
Merge git://github.com/ralsina/nikola

Conflicts:
	nikola/nikola.py
Merge pull request #352 from Tordek/master

Some refactoring/cleanup