MeowTD - Update

Changes

• Version number now appears in-game
• Wave number, total, and so on added
• Enemies now stop spawning when the wave total is met

Bug Fixes/introduced

• Enemy spawn number is different to the wave total because it's a straight ToString() of the wave total, I'll change the EnemyCount to 34 and add a wave total string associated with the variable at a later date so they tie up.