D-Net

change mail controller method names, mail sender returns boolean to check if mail send or not

Add ORP for statistics: in init/ update scripts | add the entity in creation of a community

1. Update pom's and scripts' version to 1.1.1
2. init_db.js: Add missing 'notifications' collection.
3. update_db.js: Add 'createNotificationsCollection()' function and 'addDivHelpContentsForCommunity()' function for adding class contents to 'Clarin' community....

Fix configuration update method not creating duplicates, add check for no user information

Update init_db.js to include 'Other Research Products'.

uncomment values in properties file - fixing previous commit issue with deploy

add deployments info file
remove content page from init script
update names of communities
update html for pages with htmlPageContent

Subscribers: don't subscribe again if already subscribed
Notifications: add entity, DAO, controller
Add Email entity

Change emailSender to be more generic

1. Change email subject in EmailSender.
2. update_db.js: Create function for inserting "Other Research Products" entity and relevant pages in database for all communities.

1. Update version in scripts and pom.
2. Bug fix in 'init_db' script (remove a new line).
3. Functionality for sending an email to a parametrized list of users added (EmailSender.java).
4. Add a POST method in API that gets a list of recipients and sends them an email (/invite - EmailController.java)....

Bug fixes in HtmlPageContentController.java (concurrency issues).