Added test for #1890
Fixed #1890 variable in switch
Fix for #1899: static references where the qualifying type is not a class/interface

erasure/boxing hell
Test for #1899: static references where the qualifying type is not a class/interface
Made the `ConcurrentTestsNoRuntime` more like `ConcurrentTests` (but still without the runtime tests)
Ceylondoc #1871 add index page
Added if-tests for #1904
Updated tests because of minor change to the way else-blocks are created (#1904)
Fixed some tests for #1904
Fixed #1904 Implement `narrow type in else block of if (is...)`
Handle casting of `Sequential<>` to `Empty` (#1904)
Make the `exists` and `nonempty` constructs support negation (#1904)
Fixed if-related tests for #1904
Added switch-test for #1904
Implemented narrowing `else` clauses for `switch` statments (#1904)
Fixed switch-related tests for #1904
Merge branch 'master' into 1890_for_spec_1119
Fix for #1916: boxing in if/switch expression tmp var needs to know about boxing
Test for #1916 boxing issue in switch/if expr
Test for #1914 which passes

We must have already fixed it