Added text "Press Space To Begin" to startscreen

created Arial.spritefont file in Content.
created SpriteFont  spriteFont.
load spriteFont (Arial).
added DrawString to Draw/1st game state.
Revert "Added text "Press Space To Begin" to startscreen"

This reverts commit 783885572ce7052c3435720c16311a15747f3d49.
Revert "Revert "Added text "Press Space To Begin" to startscreen""

This reverts commit da802e125649e049ae9ba1204e754d0f51d668d8.