Mail Digest Cassandra repository implementation and tests

* new column family
* row key based on digest type and domain (to allow domain level
  configuration)
* subscription stored as columns
Implementation of digest email subscription at service level
GUI and Rest controller for digest emails subscription
Mail digest Service implementation
First intergation tests for email digest

* fix dataset to add domain ippon.fr
* use mockito inject to spy on call to MailService
file pagination
Merge remote-tracking branch 'origin/master' into mailDigest

* Integrates evolution on mail service : use velocity templates
* Various other changes from master

Conflicts:
	src/main/java/fr/ippon/tatami/service/MailService.java
Integration tests and fixe for daily digest

* integration tests use specific users in dataset in order to avoid
  breaking other tests
* improve daily digest mail template
* fix issues found when testing
refactoring file pagination
refactoring file pagination
Weekly digest mail templates en integration tests

* mail template and messages for weekly digest
* partial integration tests for weekly digests
Corrected the encoding, and some wordings
Removed the "beta" warning, now that version 2.0 is nearly ready!
permittion application context
Merge pull request #326 from hellsingblack/master

application context
rename logo to avoid hardcoded company name

* rename all ippon-[xx] logos
* replace alt attibutes for these logo with messages defined in message
  bundle
Allow adding new pages with customizing with tatamiCustomization

* maps any request to /tatami/<subpath> to the jsp names <subpath>.jsp
Allow selecting the set of allowed themes in tatami.properties
Limit tag trends to 8 entries
Corrected user suggestion algo