Added parser module as a base module for all parsers
Include Parser inside the Metadata Parser
Implemented extract method on excerpt extractor
Ignore HTML
Added more tests for various scenarios
Added parsers to the require list
Improved the parsing to allpy seperators between the elements
Do not add newline elements to the excerpt
Do not add a space between inline elements
Spelling mistakes fix in content
Ignore all carriage returns in element text
Implement exceprt for a post