Fix some typos, make EOFs exactly one newline

src/board.h:
pased -> paused

src/bomb.cpp:
src/bomber.cpp:
Remove additional newline from EOF

src/bomberwidget.h:
coutns -> counts

src/building.h:
rectange -> rectangle

src/explodable.h:
explostion -> explosion
releative -> relative
colision -> collision

themes/CMakeLists.txt:
add missing newline at EOF (fixes krazy warning)