Fixed some incorrect logic around the deprecation warning for the +blueprint mixin and eliminated the deprecation warnings for the examples.

examples/blueprint_scoped/src/ie.sass

@@ -1,3 +1,4 @@
 @import blueprint.sass
 
-+blueprint-ie("body.bp")
+body.bp
+  +blueprint-ie(true)

examples/blueprint_scoped/src/print.sass

@@ -1,3 +1,4 @@
 @import blueprint.sass
 
-+blueprint-print("body.bp")
+body.bp
+  +blueprint-print(true)

examples/blueprint_scoped/src/screen.sass

@@ -1,4 +1,5 @@
 @import blueprint.sass
 @import compass/reset.sass
 
-+blueprint("body.bp")
+body.bp
+  +blueprint(true)

examples/blueprint_semantic/src/liquid.sass

@@ -7,9 +7,8 @@
 .container
   +container
 
-+blueprint-typography("body.blueprint")
-
 body.blueprint
+  +blueprint-typography(true)
   +blueprint-scaffolding-body
   hr
     +colruler

examples/blueprint_semantic/src/screen.sass

@@ -3,9 +3,8 @@
 @import blueprint/modules/scaffolding.sass
 @import compass/reset.sass
 
-+blueprint-typography("body.blueprint")
-
 body.blueprint
+  +blueprint-typography(true)
   +blueprint-scaffolding-body
   .container
     +container

frameworks/blueprint/stylesheets/blueprint/_screen.sass

@@ -19,7 +19,7 @@
 //   You can pass the body selector as the first argument when used as a top-level mixin
 //   +blueprint("body#page-1, body#page-2, body.a-special-page-type")
 =blueprint(!body_selector = "body")
-  @if !body_selector != "body"
+  @if not (!body_selector == "body" or !body_selector == true)
     @debug "[DEPRECATED] To specify a the selector \"#{!body_selector}\" to +blueprint, pass true as the first argument and mix it into #{!body_selector}."
   +blueprint-typography(!body_selector)
   +blueprint-utilities