Got travis working, fixed ruby 1.9.3 compatibility

src/bindings/ruby/Gemfile

@@ -4,4 +4,5 @@ gemspec
 
 group :test do
   gem 'minitest', '~> 5.2'
+  gem 'rake', '>10'
 end

src/bindings/ruby/SConscript

@@ -9,11 +9,15 @@ rubysources = [
     "hammer-parser.gemspec",
     "Rakefile",
     "Gemfile",
-    "Gemfile.lock",
     "README.md",
 ]
 
 rubyenv = env.Clone()
+
+for k,v in os.environ.items():
+     if "RUBY" in k or "GEM" in k or "rvm" in k:
+         rubyenv['ENV'][k] = v
+
 rubyenv['ENV']['LD_LIBRARY_PATH'] = os.path.dirname(str(libhammer_shared[0]))
 rubyenv['RBDIR'] = os.path.dirname(str(rubyenv.File("Gemfile").path))
 

src/bindings/ruby/lib/hammer/parser.rb

@@ -113,8 +113,8 @@ module Hammer
 
     def self.marshal_ch_arg(num)
       if num.is_a?(String)
-        raise ArgumentError, "Expecting either a fixnum in 0..255 or a single-byte String" unless num.bytes.length == 1
-        num = num.bytes[0]
+        raise ArgumentError, "Expecting either a fixnum in 0..255 or a single-byte String" unless num.bytesize == 1
+        num = num.bytes.first
       end
       raise ArgumentError, 'Expecting a Fixnum in 0..255 or a single-byte String' unless num.is_a?(Fixnum) and num.between?(0, 255)
       return num