add new files to support the different entities in the library
new files to support the entities of the dwca library
add an ArchiveFile class to describe the core and extensions file
rename file of the main class
Modify how the library is called
Add some scripts for testability
delete unnecesary terms.inc file
Add some classes to support data extraction from the metadata file
change the constructor of the DwCA library and add a new test for it
Migrate functions from old style dwca library to the new style
Add extension data extraction mechanism and corresponding test
Change classes to respond better to the GBIF EML metadata profile
Add test for the get_metadata method
Add field for filename
Add support to extract the metadata information from a eml element
Add methods to process the <dataset>element
separate xml parsing  related functions in a separate file
Fix some typos
Add support to parser the <additionalMetadata> element
Deletes the getters and setters in order to use the php __get y __set methods