Fix #897: Deserialization from 050 to 053 crashes optimizer.
Fix #899: Always unbox arguments to reflective calls.
Merge pull request #900 from sjrd/fix-deserialize-hack-050-to-053

Fix #897: Deserialization from 050 to 053 crashes optimizer.
Merge pull request #901 from sjrd/unbox-args-of-refl-calls

Fix #899: Always unbox arguments to reflective calls.
Fix #895: Silent debug messages in Scalajsd by default
Merge pull request #902 from gzm0/quiet-cli

Fix #895: Silent debug messages in Scalajsd by default
Fix #894: Add conversions for UndefOr
Merge pull request #903 from gzm0/undefor-conversions

Fix #894: Add conversions for UndefOr
Fix #907: Treat JSDelete as statement in desugaring
Fix #908: Recursively desugar arguments to JSDelete
Re-enable test for all but Rhino (partial #679, still fails on Rhino)
Fix #898: Check existence of prototype of target in bind polyfill
Merge pull request #911 from gzm0/fix-delete-desugar

Fix desugar for JSDelete
Merge pull request #912 from gzm0/test-delete-fail

Re-enable test for all but Rhino (partial #679, still fails on Rhino)
Merge pull request #914 from gzm0/fix-polyfill

Fix #898: Check existence of prototype of target in bind polyfill
Fix #864: Hide reflective call proxies in scalajsp by default
Fix #906: Remove accessor flags on exporter methods.

The accessor flags triggered sbt warnings for exported setters, since
they don't have the proper type (return type is Any instead of
Unit). Removing the accessor flag removes the warning and is also
better, since exporters are not accessors.
Merge pull request #913 from gzm0/refl-proxy-filter

Fix #864: Hide reflective call proxies in scalajsp by default
Merge pull request #917 from gzm0/sbt-warns

Fix #906: Remove accessor flags on exporter methods.
Fix #787: Add mechanism for propagation of DOM dependency