add LibTomMath project
add BigInteger project
add source code
link BigInteger with LibTomMath
add playground
add OSX targets
refactor structure of projects
change playground platform to OSX
change target for iOS to 7.0
change OSX deployment target to 10.9
add README.md
don't gitignore xcworkspace
add BigInteger.workspace to repository
synx BigInteger
synx LibTomMath
Merge branch 'master' of github.com:kirsteins/BigInteger