Added sample post and implemented first run at pulling out metadata
Changed README to reflex the new format for expressing post metadata
Changed a spec name
Renamed HeaderParser to MetadataParser
Removed redundant spec
Renamed #parse_headers to #parse
Created custom FileTypeError
Removed unused require
Extracted allowed file extensions into module level constant
Refactored FileIterator to user extensions constant
Merge pull request #1 from brilliantfantastic/parsing-headers

Header Parser (meta data parser)