MISC: removed field_base: topics (we're using tags instance)
CORE:  adding file_field

tthis should already be here .but was missing somehow
CORE: social media field for addthis
Merge pull request #5 from emmairwin/field_file_addition

CORE:  adding file_field
Merge pull request #4 from emmairwin/remove_topics_base

MISC: removed field_base: topics (we're using tags instance)
Merge pull request #6 from emmairwin/addme_socialmedia

CORE: social media field for addthis