README.md: Spelling

Very minor spelling correction
Use pointers in the image client interfaces & api.
Merge pull request #71 from ncdc/image-client-pointers

Merged by openshift-bot
Merge pull request #70 from sajmoon/readme-spelling

README.md: Spelling
Fix privileged flag in build containers
Merge pull request #73 from csrwng/fix_privileged_flag_in_build_containers

Merged by openshift-bot