Add support for LoadWithPartialName

[kumarshantanu]

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Absence for this support leads to hacky way of eval'ing LoadWithPartialName at load time.

Discussion thread: https://groups.google.com/forum/#!topic/clojure-clr/eB67tFfLTo8

Note: Pre-loading in lein-clr may not work for compiled EXE or DLL files.