Introduce an Exists predicate to be used in the absence of meaningful predicates on a node
Make predicate combination easy to change, and change it to assume dependence
Make Muninn support Java8
Merge pull request #3113 from systay/exists-predicate

[2.2] Another tweak of the cardinality model
Merge pull request #3117 from chrisvest/2.2-make-pagecache-support-java8

2.2 Make Muninn support Java8
Added login command and NTN service
Adapt login frame to current style
Display avatar of current User
Document NTN module a bit more
Break out sync into SyncService
Center-align avatar
Prepare for persisted login status
Fix logout process
Sync on changes
A little less obtrusive  error message
Reload folders/documents after sync
Set timestamp for last sync
Flag for in sync
Prepare for displaying cloud status
Add angularMoment