Updated .gitignore to ignore the folder [bB]uild
Added ObjectPool scripts

Object Pool instantiates objects once and reuse them as the games needs
a new object. You can opt to instantiate a new object if the pool is
empty.
Revert "Added ObjectPool scripts"

This reverts commit 3da01798927782f4eefab903744b072ab2432cbb.
Merge branch 'master' of https://github.com/IMEplusplus/LD30