Completely redo Basic Grenade Training
Lesson plan:
- Select grenade
- Throw grenade
- Aim, set timer, set bounciness
- Destroy targets
Lua scripts for engine testing. These scripts are the same as other Lua scripts
in Hedgewars, but you ought to call `EndLuaTest(TEST_SUCCESSFUL)` or
`EndLuaTest(TEST_FAILED)` when the test is completed.