D-Net

1. Added script to initialize mongo database with name "openaire_admin" - if database already exists nothing happens ('drop' variable set to false)

1. API to find divhelpcontents by div
2. API to find div by name

Added missing files from previous commit about DivId and DivHelpContent

1. Added DivId class and API : special classes to be used by explore portal pages which have steps
2. Added DivHelpContent class and API
3. Added parameter 'div' (true/false) in '/community' to get communities related to some divIds
4. Added parameter 'div' (true/false) in '/community/{pid}/pages' to get pages of a community, which are related to some divIds...

1. Change Community methods - use pid (community) to query (GET requests)
2. community/{pid}/page/toggle & community/{pid}/entity/toggle - use pid to identify community
3. New (/pagehelpcontent/save) and Update (/pagehelpcontent/update) APIs for helpcontents separated...

'pid' field added in entities and communities for queries by portal | page help contents ordered by placement and order when returned | api to get page help contents by community name or community id (again ordered): '/pagehelpcontent?community=' or '/pagehelpcontent?communityId=' | api to get specific page of community: '/community/{id}/pages?page_route='

new Community has enabled all pages and entities | Toggle multiple community pages/entities at once

Community and Entity class created | All Classes and APIs configured according to OpenAIRE (Community's APIs may change)

initial commit <3