REST Call for fetching commits in a branch

Changes to be committed:
	modified:   git-client/src/main/java/nl/tudelft/ewi/git/client/Repositories.java
	modified:   git-client/src/main/java/nl/tudelft/ewi/git/client/RepositoriesImpl.java
	modified:   git-client/src/test/java/nl/tudelft/ewi/git/client/RepositoriesMock.java
	modified:   git-client/src/test/java/nl/tudelft/ewi/git/models/DetailedRepositoryModelFactory.java
	new file:   git-models/src/main/java/nl/tudelft/ewi/git/models/DetailedBranchModel.java
	modified:   git-models/src/main/java/nl/tudelft/ewi/git/models/DetailedRepositoryModel.java
	modified:   git-server/src/main/java/nl/tudelft/ewi/git/inspector/Inspector.java
	modified:   git-server/src/main/java/nl/tudelft/ewi/git/models/Transformers.java
	modified:   git-server/src/main/java/nl/tudelft/ewi/git/web/RepositoriesApi.java