bind ViewModelComposer as Singleton
added basic JUnit test
add guice module without singletons
ignore test
add base test for views
ignore base test
add test for DunningView
organise imports
use guice modules without singletons
add test for ErrorView
add tests for HelpView
add tests for LendingView
use BaseTest
add tests for ReturnView
add tests for StudentInformationView
add tests for TeachingMaterialView
Merge pull request #728 from davherrmann/issue#720

Issue#720: add tests for Views