When the result of nimble dump contains nimDir, use nimDir as the initial search path for the nim executable instead of returning the directory itself (which would never be valid).
When searching for an executable (nimsuggest, nimlangserver, etc.), don't use the HOME environment variable on Windows. This was causing issues with node's path resolution functions which don't accept undefined.
fixes #35
nimble dumpcontainsnimDir, usenimDiras the initial search path for thenimexecutable instead of returning the directory itself (which would never be valid).HOMEenvironment variable on Windows. This was causing issues with node'spathresolution functions which don't acceptundefined.