Add auto_increment for table node, and change the column "create_date"
to "create_time" in table portalpage.
change decimal to float
Revert "Add auto_increment for table node, and change the column "create_date" to "create_time" in table portalpage."

This reverts commit b026157c0e1e3bda7ea3378ef50a6bb2e837da11.
Merge branch 'master' of https://github.com/DasHerz/wifiwolf.git
add DOS/repository and unit test cases