renew spec file

README.md

@@ -25,4 +25,4 @@ For example,
 will execute
 
     nvcc -I. -O2 -o culib.o -c culib.cu --compiler-options -fno-common \
-                                        --compiler-options -stdlib=libc++ --compiler-options  -Wall
+                                        --compiler-options -stdlib=libc++ --compiler-options -Wall

mkmf-cu.spec

@@ -2,13 +2,13 @@ Gem::Specification.new do |s|
   s.name        = 'mkmf-cu'
   s.version     = '0.1.0'
   s.date        = '2016-02-21'
-  s.summary     = "mkmf wrapper for CUDA"
-  s.description = "mkmf wrapper for CUDA"
+  s.summary     = "Write Ruby extention in C/C++ with NVIDIA CUDA."
+  s.description =
+  "Write Ruby extention in C/C++ with NVIDIA CUDA. A simple wrapper command for nvcc and a monkey patch for mkmf."
   s.authors     = ["Takashi Tamura"]
   s.email       = ''
   s.files       = ["lib/mkmf-cu.rb", "lib/mkmf-cu/opt.rb"]
-  s.homepage    =
-    'http://rubygems.org/gems/hola'
+  s.homepage    = 'https://github.com/ruby-accel/mkmf-cu'
   s.license       = 'MIT'
   s.executables << "mkmf-cu-nvcc"
 end