Change gem spec to allow carrierwave 0.10.0, and create a new gemfile for carrierwave 0.9.0.

Author: rafaelgaspar

carrierwave-mongoid.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
-  s.add_dependency "carrierwave", [">= 0.8.0", "< 0.10.0"]
+  s.add_dependency "carrierwave", [">= 0.8.0", "< 0.11.0"]
   s.add_dependency "mongoid", [">= 3.0", "< 5.0"]
   s.add_dependency "mongoid-grid_fs", ["~> 1.3"]
   s.add_development_dependency "rspec", ["~> 2.14"]

gemfiles/carrierwave-0.9.gemfile

@@ -0,0 +1,5 @@
+source "https://rubygems.org"
+
+gem "carrierwave", "~> 0.9.0"
+
+gemspec path: "../"