bumpup version to 0.1.2, remove date, reorder

decimal.gemspec

@@ -1,13 +1,19 @@
 Gem::Specification.new do |s|
   s.name = "decimal"
-  s.version = "0.1.1"
-  s.date = "2014-10-28"
+  s.version = "0.1.2"
   s.summary = "(yet another) multi-precision decimal arithmetic library"
-  s.homepage = "http://github.com/tadd/decimal"
   s.description = <<-EOS.split("\n").map{|l|l.lstrip}.join(" ")
     Decimal is (yet another) multi-precision decimal arithmetic library.  It
     provides simple, compact, fast, precise, stable and easy-to-use solution.
   EOS
+
+  s.required_ruby_version = '>= 1.9.3'
+  s.license = 'Ruby'
+
+  s.author = "Tadashi Saito"
+  s.email = "[email protected]"
+  s.homepage = "http://github.com/tadd/decimal"
+
   s.extensions = "extconf.rb"
   s.files = %w(.document COPYING BSDL INSTALL README.1st README.rdoc TODO decimal.c
                decimal.gemspec depend extconf.rb inum193.h inum200.h inum21.h inum22.h
@@ -16,8 +22,6 @@ Gem::Specification.new do |s|
   s.has_rdoc = true
   s.rdoc_options = %w(-t Decimal -m README.rdoc)
   s.extra_rdoc_files = %w(README.rdoc decimal.c)
-  s.authors = "Tadashi Saito"
-  s.email = "[email protected]"
-  s.license = 'Ruby'
+
   s.post_install_message = "\n\t\t" << IO.read("README.1st") << "\n"
 end