making import-java-ns more robust, Moritz comments on #235
Merge pull request #6 from chicken-mobile/modules

making import-java-ns more robust, Moritz comments on #235
jlambda reflection code works in expansion time

As the lolevel jni functions need to be available in expansion time
via import-for-syntax a new module as been created. This is now the
module grap:

    jni-lolevel (primitives without reflection) ->
    jni-highlevel (jlambda stuff, reflection in expansion time) ->
    jni-jvm (highlevel + jvm-init stuff) / jni-dvm (same as highlevel,
    keep for symmetry)
updating java-import-ns docs
merge master in jlambda