new repr of Callable
fix bugs after introduction of new def of Callable
some fixes to Tuple/Sequential
oops
Merge branch 'master' of github.com:ceylon/ceylon.language into callable
make String Sequential
Update to use tuples in Callable type
Update tests to reflect new changes in tuples (typesafe index)
Update tests with changes to nonempty, String, FixedSized
Merge branch 'master' of github.com:ceylon/ceylon.language into callable

Conflicts:
	runtime/ceylon/language/Tuple.java
Merge branch 'sequential' of github.com:ceylon/ceylon.language into sequential
Work on #174
update method ref syntax
Update expected String classnames
Update tests for #174
make use of new function definition syntax
Rename StringOfNone -> EmptyString, StringOfSome -> SequenceString
Rename ArrayOfNone -> EmptyArray
Rename ArrayOfSome -> NonemptyArray
Array tests