Merge pull request #1 from codecombat/master

Fixes error "Type str doesn't support the buffer API"
Fix for "Type str doesn't support the buffer API"

subprocess.check_output("mongod --version",shell=True) returns a byte
string so to convert it to a regular string we should do this :
mongo_version_string = subprocess.check_output("mongod
--version",shell=True)
mongo_version_string = mongo_version_string.decode(encoding='UTF-8')
Merge pull request #432 from Akhil-T/master

Fix for "Type str doesn't support the buffer API"