Adapt to latest API changes in ceylon/ceylon-module-resolver#87 and ceylon/ceylon-runtime#57 and support osgi resolver
Add tests for Main resolvers for ceylon/ceylon-module-resolver#87 and #370
Updated tests for Main because poms need group+artifact ceylon/ceylon-module-resolver#87
Main: Added ignored test for pom.xml until we fix the resolver in ceylon/ceylon-module-resolver#87
String: Fixed impl of by
Documentation fixes
Removed generateArray Java impl since its Ceylon decl is nowhere to be found
String: fix some confusion wrt boxed/unboxed return types