add additional handlers to have a working local corpus services interface

src/main/java/de/uni_hamburg/corpora/server/Favicon.java

src/main/java/de/uni_hamburg/corpora/server/Report.java

src/main/java/de/uni_hamburg/corpora/server/SendFile.java

src/main/java/de/uni_hamburg/corpora/server/Static.java

src/main/java/de/uni_hamburg/corpora/server/WebRoot.java