Don't pass the entire environment to SCons. Only pass the PATH

Don't clober the Environment (and thus the ENV['PATH'] by redefining it
and don't link against lr by default. Only add it if uname is not Darwin

Changed parser test macros so that _parse_ok just checks whether the mat...

Changed parser test macros so that _parse_ok just checks whether the match succeeded and _parse_match actually checks the resulting parse tree

Made test-suite work on its own

Added install target

update usage instructions to assume system-wide install; this will change later, but is accurate now.

Binding support

Added coverage support

Conflicts:
	SConstruct

Fix asprintf build warning

GLR