node < 0.10 fails travis build => remove 0.6 & 0.8
node < 0.10 fails travis build => remove 0.6 & 0.8

from travis.yml

karek314/cpp-ethereum,eco/cpp-ethereum,ethers/cpp-ethereum,eco/cpp-ethereum,PaulGrey30/go-get--u-github.com-tools-godep,subtly/cpp-ethereum-micro,smartbitcoin/cpp-ethereum,vaporry/cpp-ethereum,gluk256/cpp-ethereum,Sorceror32/go-get--u-github.com-tools-godep,smartbitcoin/cpp-ethereum,ethers/cpp-ethereum,PaulGrey30/go-get--u-github.com-tools-godep,johnpeter66/ethminer,LefterisJP/cpp-ethereum,joeldo/cpp-ethereum,karek314/cpp-ethereum,PaulGrey30/go-get--u-github.com-tools-godep,anthony-cros/cpp-ethereum,expanse-project/cpp-expanse,arkpar/webthree-umbrella,joeldo/cpp-ethereum,johnpeter66/ethminer,Sorceror32/.-git-clone-https-github.com-ethereum-cpp-ethereum,gluk256/cpp-ethereum,smartbitcoin/cpp-ethereum,subtly/cpp-ethereum-micro,expanse-project/cpp-expanse,PaulGrey30/go-get--u-github.com-tools-godep,Sorceror32/go-get--u-github.com-tools-godep,LefterisJP/cpp-ethereum,maran/go-ethereum,eco/cpp-ethereum,expanse-org/cpp-expanse,gluk256/cpp-ethereum,yann300/cpp-ethereum,vaporry/cpp-ethereum,karek314/cpp-ethereum,expanse-org/cpp-expanse,xeddmc/cpp-ethereum,Sorceror32/go-get--u-github.com-tools-godep,karek314/cpp-ethereum,LefterisJP/webthree-umbrella,vaporry/evmjit,maran/go-ethereum,PaulGrey30/.-git-clone-https-github.com-ethereum-cpp-ethereum,Sorceror32/go-get--u-github.com-tools-godep,maran/go-ethereum,vaporry/webthree-umbrella,Sorceror32/.-git-clone-https-github.com-ethereum-cpp-ethereum,PaulGrey30/.-git-clone-https-github.com-ethereum-cpp-ethereum,smartbitcoin/cpp-ethereum,Sorceror32/.-git-clone-https-github.com-ethereum-cpp-ethereum,LefterisJP/cpp-ethereum,PaulGrey30/.-git-clone-https-github.com-ethereum-cpp-ethereum,joeldo/cpp-ethereum,ethers/cpp-ethereum,d-das/cpp-ethereum,programonauta/webthree-umbrella,subtly/cpp-ethereum-micro,anthony-cros/cpp-ethereum,xeddmc/cpp-ethereum,johnpeter66/ethminer,yann300/cpp-ethereum,yann300/cpp-ethereum,LefterisJP/cpp-ethereum,subtly/cpp-ethereum-micro,joeldo/cpp-ethereum,joeldo/cpp-ethereum,maran/go-ethereum,PaulGrey30/.-git-clone-https-github.com-ethereum-cpp-ethereum,d-das/cpp-ethereum,smartbitcoin/cpp-ethereum,gluk256/cpp-ethereum,PaulGrey30/go-get--u-github.com-tools-godep,Sorceror32/go-get--u-github.com-tools-godep,d-das/cpp-ethereum,LefterisJP/webthree-umbrella,vaporry/cpp-ethereum,PaulGrey30/.-git-clone-https-github.com-ethereum-cpp-ethereum,smartbitcoin/cpp-ethereum,expanse-org/cpp-expanse,anthony-cros/cpp-ethereum,eco/cpp-ethereum,ethers/cpp-ethereum,maran/go-ethereum,yann300/cpp-ethereum,vaporry/cpp-ethereum,xeddmc/cpp-ethereum,eco/cpp-ethereum,vaporry/evmjit,karek314/cpp-ethereum,vaporry/cpp-ethereum,xeddmc/cpp-ethereum,xeddmc/cpp-ethereum,subtly/cpp-ethereum-micro,maran/go-ethereum,anthony-cros/cpp-ethereum,expanse-project/cpp-expanse,expanse-org/cpp-expanse,d-das/cpp-ethereum,Sorceror32/.-git-clone-https-github.com-ethereum-cpp-ethereum,PaulGrey30/.-git-clone-https-github.com-ethereum-cpp-ethereum,ethers/cpp-ethereum,anthony-cros/cpp-ethereum,xeddmc/cpp-ethereum,PaulGrey30/go-get--u-github.com-tools-godep,expanse-project/cpp-expanse,maran/go-ethereum,expanse-org/cpp-expanse,maran/go-ethereum,Sorceror32/.-git-clone-https-github.com-ethereum-cpp-ethereum,anthony-cros/cpp-ethereum,vaporry/cpp-ethereum,Sorceror32/go-get--u-github.com-tools-godep,gluk256/cpp-ethereum,LefterisJP/cpp-ethereum,yann300/cpp-ethereum,yann300/cpp-ethereum,karek314/cpp-ethereum,joeldo/cpp-ethereum,programonauta/webthree-umbrella,expanse-project/cpp-expanse,gluk256/cpp-ethereum,eco/cpp-ethereum,d-das/cpp-ethereum,d-das/cpp-ethereum,ethers/cpp-ethereum,expanse-project/cpp-expanse,LefterisJP/cpp-ethereum,Sorceror32/.-git-clone-https-github.com-ethereum-cpp-ethereum,maran/go-ethereum,subtly/cpp-ethereum-micro,expanse-org/cpp-expanse,chfast/webthree-umbrella