This change reduces needless version churn. Before, the main JS/CSS files
were assigned new versions for each build based on the build timestamp.
After, the files will only be assigned new versions when they change based
on the MD5 hashcode of their contents.
This change reduces needless version churn. Before, the main JS/CSS files were assigned new versions for each build based on the build timestamp. After, the files will only be assigned new versions when they change based on the MD5 hashcode of their contents.