Added Pressure Plates

Added Fluids and corresponding Block
Fix groupId

Signed-off-by: Steven Downer <grinch@outlook.com>
Fix groupId in magma.gradle

Signed-off-by: Steven Downer <grinch@outlook.com>
Merge pull request #21 from Waterpicker/master

Added Pressure Plates
Add CustomFlower

Signed-off-by: Steven Downer <grinch@outlook.com>