bake: Several bug taxonomy-related fixes for incorrect incremental bakes. * Improve how the baker processes taxonomy terms and figures out what needs to be re-baked or not. * Create bake entries for clean taxnomy terms so they're not deleted by an incremental bake. * Add more information to bake records. * Slugify taxonomy terms is now done by the route in one place. * Fix a bug where the cache key for invalidating rendered segments was not computed the same way as when the caching was done. * Fix how term combinations are passed around, rendered, printed, parsed, etc. (TODO: more word needed in the routing functions) * Expose to the template whether a taxonomy term is a combination or not. * Display term combinations better in the built-in theme. * Rename `route.taxonomy` to `route.taxonomy_name` to prevent confusion. * Add options to show bake records for previous bakes.

CACHE_DIR = '_cache'
ASSETS_DIR = 'assets'
TEMPLATES_DIR = 'templates'
THEME_DIR = 'theme'

CONFIG_PATH = 'config.yml'
THEME_CONFIG_PATH = 'theme_config.yml'
THEME_INFO_PATH = 'theme_info.yml'

DEFAULT_FORMAT = 'markdown'
DEFAULT_TEMPLATE_ENGINE = 'jinja2'
DEFAULT_POSTS_FS = 'flat'
DEFAULT_DATE_FORMAT = '%b %d, %Y'
DEFAULT_THEME_SOURCE = 'http://bitbucket.org/ludovicchabant/'

PIECRUST_URL = 'http://bolt80.com/piecrust/'

try:
    from piecrust.__version__ import APP_VERSION
except ImportError:
    APP_VERSION = 'unknown'

import os.path
RESOURCES_DIR = os.path.join(os.path.dirname(__file__), 'resources')