Merge pull request #86 from qnikst/master

allow hakyll to build against ghc-7.6.1
Version bump (3.4.2.0)
Bump unix and snap dependency
Remove obsolete isObsolete method
Conditional getModificationTime
Conditionals in preview server
Add http://michaelxavier.net/ to examples
Allow parsing of relaxed ISO8601 date format in published metadata field. Many of HTML to Markdown converters output non-ISO8601 through YAML emitters. YAML (and other systems) allow the T separator to be replaced by a space for increased readability (see http://sourceforge.net/mailarchive/message.php?msg_id=29987568).
Merge pull request #90 from mloskot/yaml-date-fix

Allow parsing of relaxed ISO8601 date format in published metadata field
Bump QuickCheck dependency
Allow date as field for renderDateField
Bump binary dependency
Pick Store from the develop branch
Pick metadata parsing from old develop
Rules will be in IO...
Remove Resource type
Alternative instance for Compiler
Rewrite template application
Context module?
Added %Y-%m-%d format to enable short date parsing in metadata.