add .sass-cache directory into the default .gitignore file
add .sass-cache directory into the default .gitignore file

hboon/RubyMotion,hboon/RubyMotion,beni55/RubyMotion,katsuyoshi/RubyMotion,beni55/RubyMotion,katsuyoshi/RubyMotion,HipByte/RubyMotion,HipByte/RubyMotion,incbee/RubyMotion,jjaffeux/RubyMotion,jjaffeux/RubyMotion,hboon/RubyMotion,katsuyoshi/RubyMotion,jjaffeux/RubyMotion,jjaffeux/RubyMotion,HipByte/RubyMotion,incbee/RubyMotion,beni55/RubyMotion,incbee/RubyMotion,katsuyoshi/RubyMotion,beni55/RubyMotion,incbee/RubyMotion