Functions to print binary trees in a pretty way
.----------------------(006)-------.
.--(001)-------. .--(008)--.
.--(-02) .--(003)-------. (007) (009)
.-------(-06) (002) .--(005)
.--(-08)--. (004)
(-09) (-07)
[Original code](Original code from http://stackoverflow.com/a/13755911/5184480)