V6 Release

Completely ignoring my new posting schedule because I had nothing to do yesterday, SFoS(due to change)  version 6 is done!

This update brings an entire new boss as well as the normal changes which I shall list now.

changes:
- added new boss

- added several new sprites relating to boss
  - boss 2 regular shot
  - boss 2 burst shot
  - boss 2 rage shot
  - boss 2 sprite
  - boss 2 background

- added new portal to hub room

- changed scoring from bosses
  - boss 2 gives 1 point when beaten
  - boss 3 gives 3 points when beaten

the next update may be delayed a few days due to the size of it, I want to make the fourth boss unique and special therefore it could take me awhile to see my vision through and get it in code.

happy playing!