Fixed the overloaded method ambiguity with the curried convertAndSend methods.

Renamed the curried convertAndSend to convertModifyAndSend. This ambiguous overloading compiles but cannot be used (see also https://issues.scala-lang.org/browse/SI-2628)
Merge pull request #38 from rparree/overloading_ambiguity

Fixed the overloaded method ambiguity with the curried convertAndSend