Explicitly order all commits

Configuration option (config.toml):

[git]
mergeMessage = "array or string"

Fixes #38

Example usage:

node query.js --sql "select metadata.tags as tags, metadata.title as title where count(metadata.tags) == 1 and contains(metadata.tags, 'Článek');"

prints list of articles which have only tag "Článek" - usefull for
listing not yet tagged articles

1. Not building without build/theme directory (race condition)
2. Wrong defaults for contentdir
3. Other bugs caused by those. Fixes #32 and #33

and add few command line options

use ./index.js --help to learn more

TODO: fix lightboxes

Config - returns configuration
ReadFiles - reads files from config.articlesLocation
Print - prints everything it gets