Added failing integration tests to show that unsecure code can be ran, the loader is not safe yet.
The tests that check for a security exception now expect a SecurityException to occur.
Sandboxing mods now partially works, however code executed in callbacks is still unsafe.
Removed unnecessary imports.
Fixed security sandbox for untrusted mods, fixes #69.
Fixed failing tests due to Maven test settings.
Removed unused cardshifter-sandbox-helper module.
Added missing versions on the plugins used in the cardshifter parent module.
Merge branch 'develop' of https://github.com/Cardshifter/Cardshifter into ecs-module-support
Removed policy debugging from cardshifter-core integration tests.
You cannot start the server anymore without a security manager installed.
Added server.policy in cardshifter-server to use with the security manager when running the module from inside the IDE, also updated readme.
Moved src/test/resources/java.policy to src/test/resources/com/cardshifter/core/integration/javamodtest.policy in the cardshifter-core module.
Added the cardshifter-server policy file for when running the server standalone, updated readme and travis configuration to include the cardshifter-server policy file.
Update README.md

just a couple minor edits
Added extra testcase to Java mod integration to ensure that ECSGame.addSystem() works when a mod has no permissions.
Merge origin/ecs-module-support into ecs-module-support
Server integration tests are now executed with the correct security policy, closes #87.
Corrected security policy for integration tests in cardshifter-core.
Added security manager debugging in cardshifter-core.