fix reading git remote URLs on Ruby 1.8.7

Strip extra whitespace in the end because URI.parse chokes on it.

Fixes #49, closes #50, closes #51

lib/git_deploy/configuration.rb

@@ -36,7 +36,7 @@ def git_config
     def remote_urls(remote)
       git_config["remote -v"].to_s.split("\n").
         select {|l| l =~ /^#{remote}\t/ }.
-        map {|l| l.split("\t")[1].sub(/\(.+?\)$/, '') }
+        map {|l| l.split("\t")[1].sub(/\s+\(.+?\)$/, '') }
     end
 
     def remote_url(remote = options[:remote])