Update readme
Merge pull request #15 from ipa-rmb/groovy_dev

Some feedback on documentation
Fixed grammar and added explanation about restarting terminal
Merge pull request #17 from Seanny123/patch-2

Fixed grammar and added explanation about restarting terminal
Update README.md
Update README.md
Update manifest.xml
Merge pull request #19 from Seanny123/patch-3

Update README.md
Merge pull request #21 from max90727/patch-1

Update manifest.xml
fixed a bug in face_recognizer.cpp
Merge pull request #22 from ipa-rmb/groovy_dev

fixed a bug in face_recognizer.cpp
merging