Merge pull request #323 from jwakely/patch-1

Include header for std::invalid_argument

Author: mihaibuzgau

util/src/environment.cc

@@ -1,5 +1,6 @@
 #include <leatherman/util/environment.hpp>
 #include <boost/nowide/cenv.hpp>
+#include <stdexcept>
 
 using namespace std;