Removed redundant glError? from Map class and renamed CommonMethods#glError? to #gl_error?, added debug settings for disabling shaders and whether to exit on opengl error

lib/manifest.rb

@@ -2,6 +2,7 @@ class IMICFPS
   class Manifest
     attr_reader :name, :model, :collision, :collision_mesh, :collision_resolution, :physics, :scripts, :uses
     def initialize(manifest_file: nil, package: nil, name: nil)
+
       unless manifest_file
         raise "Entity package not specified!" unless package
         raise "Entity name not specified!" unless name
@@ -10,6 +11,7 @@ class IMICFPS
 
       raise "No manifest found at: #{manifest_file}" unless  File.exist?(manifest_file)
 
+
       @file = manifest_file
       parse(manifest_file)
     end
@@ -55,4 +57,4 @@ class IMICFPS
     Script = Struct.new(:name, :source)
     Dependency = Struct.new(:package, :name)
   end
-end
+end