Fixes #59. Avoid find directories as executables.
Fixes #59. Avoid find directories as executables.

looker/execjs,ibroadfo/execjs,rails/execjs,looker/execjs,maclover7/execjs,ibroadfo/execjs,atambo/execjs,sstephenson/execjs,rails/execjs,atambo/execjs,maclover7/execjs,golla/sample1,golla/sample1,universsky/execjs,universsky/execjs,lunks/execjs,sstephenson/execjs,lunks/execjs