Added "scons install" target

INSTALL

@@ -1,3 +1,4 @@
 To compile and install FCE Ultra, follow these steps:
   1.  Ensure that SCons, SDL, and liblua5.1 are installed on your system.
-  2.  Run "scons"
+  2.  Run "scons" to build fceux.
+  3.  To install on Linux/BSD run "scons install" as root.

SConstruct

@@ -11,9 +11,13 @@ opts.AddOptions(
 )
 
 env = Environment(options = opts)
+env.Alias(target="install", source=env.Install(dir="/usr/local/bin/", source="bin/fceux"))
+
 # Default compiler flags:
 env.Append(CCFLAGS = ['-Wall', '-Wno-write-strings', '-Wno-sign-compare'])
 
+
+
 if os.environ.has_key('PLATFORM'):
   env.Replace(PLATFORM = os.environ['PLATFORM'])
 if os.environ.has_key('CC'):