make bonus code form readonly so admin have to hand out the code to player to redeem
Replacing old doc/figs/configuration/configuration-game-admin-smartgrid-designer-new-level.png with image that shows "Unlock condition" field.
doc/challenge-design-game-admin-smartgrid-game.rst: Corrected to state that level name and an unlock condition are required to create a new level.
challenge-design-game-admin-resource-game.rst, challenge-design-game-admin-smartgrid-game.rst: Fixed typos noted by ICS 691 Spring 2013 students in past survey.
doc/challenge-design-game-admin-resource-game.rst: Edited "From Energy Goal Games to Resource Goal Games" to indicate that support for the water game is enabled by default.
doc/figs/configuration/configuration-game-admin-smartgrid-designer-new-level.png: New image has smaller file size (previous one was badly converted and > 1.74 MB).
Merge pull request #565 from jtakayama/master

Fixed an outdated image, incorrect documentation for the Water resource game, and some typos.
doc/installation-makahiki-vagrant-quickstart.rst, doc/installation-makahiki-vagrant-running-makahiki.rst: Cleaned up wording of instructions to start the server.
Merge pull request #566 from jtakayama/master

Typo correction for instructions to start the server in a Vagrant installation.
Update installation-makahiki-vagrant-environment-setup.rst to clarify that git commands should work from the standard Command Prompt without having to open Git for Windows.
Update installation-makahiki-vagrant-environment-setup.rst: Fixed missing single quotes in last edit.
Update installation-makahiki-vagrant-environment-setup.rst: Clarified git clone instructions.
Update installation-makahiki-vagrant-environment-setup.rst: Clarified git clone instructions.
Update installation-makahiki-vagrant-environment-setup.rst: Clarified git clone instructions.
Merge pull request #569 from jtakayama/master

Cleaned up Vagrant documentation: installation-makahiki-vagrant-environment-setup.rst
Update installation-makahiki-vagrant-environment-setup.rst: Specified per-user requirement for vagrant box add on Windows.
Merge pull request #570 from jtakayama/master

Updated installation-makahiki-vagrant-environment-setup.rst.
Fixing typos in Vagrant documentation.
Fixing typos in Vagrant documentation.
Update installation-makahiki-vagrant-environment-setup.rst