Update README.md

Adding Travis build badge.
pylint is now installed by pip3.
Merge branch 'master' of github.com:hwasungmars/DNAuthor
Removing python3-pip package as Travis doesn't have it.
Renaming pip3 to pip for compatibility.
Merge pull request #8 from hwasungmars/hwasungmars

Hwasungmars
Merge branch 'master' of github.com:hwasungmars/DNAuthor
Fixing the broken build by adding __init__. Linting by default when testing.
Merge pull request #9 from hwasungmars/hwasungmars

Adding data directory in git ignore files.
Merge branch 'master' of github.com:hwasungmars/DNAuthor
Merge branch 'master' into hwasungmars

Conflicts:
	build/setup.sh