[Pontem] Differentiate different subprojects in Travis build

[ldanielmadariaga]

As the repo grows and subprojects start to be added we need to differentiate these in Travis builds.
IMHO the ideal way to tackle this would be to have each subproject run in their own Travis instance, I'm unsure whether this is doable so I need to investigate it a bit more.

Alternative: Add a pre-commit hook that parses extracts subproject directory of modified files and, adds it as a tag / part of the commit message. Add Travis conditionals to manage the behavior of each subproject.

[ldanielmadariaga]

As always I was wrong :)
Travis still only supports 1 Travis file per 1 repo.

[nagarkar]

can you label label it with 'help wanted' or 'good first issue' if appropriate?