Fix invalid usage of create-space
Issue:http://rnd-github.huawei.com/paas/cli/issues/2

Before Fix: If cf user does
'cf create-space my-space blahablaha'
then its success

After Fix:If cf user does
'cf create-space my-space blahablaha'
then it will fail with proper reason
Fix invalid usage of cf app & cf delete
Issue:http://rnd-github.huawei.com/paas/cli/issues/9

Before Fix: If cf user does
'cf app cf-env blahablaha'
then its success

'cf delete cf-env blahablaha'
then its success

After Fix:If cf user does
'cf app cf-env blahablaha'
then it will fail with proper reason

'cf delete cf-env blahablaha'
then it will fail with proper reason
Reverted back the changes for app and delete
Fixed the comments
Merge pull request #7 from SrinivasChilveri/hw-issue-2

Fix invalid usage of create-space