Update Rakefile to supply GIT credential at the correct directory.

Rakefile

@@ -1,18 +1,18 @@
 require "rubygems"
 
 # Usage: NOT to be used manually
-desc 'Publish site from Travis CI to GitHub Pages'
+desc 'Update site documentation to GitHub Pages'
 task :travis do
-  system "git config user.name '#{ENV['GIT_NAME']}'"
-  system "git config user.email '#{ENV['GIT_EMAIL']}'"
-  system 'git config credential.helper "store --file=.git/credentials"'
-  File.open('.git/credentials', 'w') do |f|
+  system 'git clone https://github.com/urho3d/urho3d.github.io.git doc-Build'
+  system "ruby -lne 'BEGIN { credits = false }; puts $_ if credits; credits = true if /bugfixes by:/; credits = false if /^$/' Readme.txt |ruby -i -le 'BEGIN { credits = STDIN.read }; puts ARGF.read.gsub(/(?<=bugfixes by\n).*?(?=##)/m, credits)' doc-Build/about.md"
+  system 'rm -rf doc-Build/documentation'
+  system 'cp -r Docs/html doc-Build/documentation'
+  system "cd doc-Build && git config user.name '#{ENV['GIT_NAME']}'"
+  system "cd doc-Build && git config user.email '#{ENV['GIT_EMAIL']}'"
+  system 'cd doc-Build && git config credential.helper "store --file=.git/credentials"'
+  File.open('doc-Build/.git/credentials', 'w') do |f|
     f.write("https://#{ENV['GH_TOKEN']}:@github.com")
   end
-  system "git clone https://github.com/urho3d/urho3d.github.io.git doc-Build"
-  system "ruby -lne 'BEGIN { credits = false }; puts $_ if credits; credits = true if /bugfixes by:/; credits = false if /^$/' Readme.txt |ruby -i -le 'BEGIN { credits = STDIN.read }; puts ARGF.read.gsub(/(?<=bugfixes by\n).*?(?=##)/m, credits)' doc-Build/about.md"
-  system "rm -rf doc-Build/documentation"
-  system "cp -r Docs/html doc-Build/documentation"
   system "cd doc-Build && git add -A && git commit -q -a -m 'Travis CI automated site deploy at #{Time.now.utc}.' && git push -q"
-  File.delete '.git/credentials'
+  File.delete 'doc-Build/.git/credentials'
 end