Setup android app

[platisd]

Description

• Sets up an initial android front-end application that allows users to locate the desks of their colleagues
  • Basic Android application that executes GET requests
  • Travis CI build
  • Initial tests (need to learn more on how to do this!)
  • Initial test coverage (need to increase coverage!)
• Changed server responses, for getting the location of a node or an employee, to well-formatted JSON strings for easier parsing on the front-end. See 8e7a4a51849d66aa7d2ef72192e73c8fa168b1bf.

Overall, most time was spent in trying to make the Android app build on Travis and to get coverage reports show up correctly. This commit decreases the overall coverage since I currently lack the knowledge related to the gimmicks of Android testing. However, this should not be an extremely difficult task and once this pull request is merged, I will open a relevant issue.

Solved issue(s)

Fixes #73

[codecov[bot]]

Codecov Report

Merging #75 into dev will decrease coverage by 3.96%. The diff coverage is 14.28%.

@@            Coverage Diff             @@
##              dev      #75      +/-   ##
==========================================
- Coverage   75.05%   71.08%   -3.97%     
==========================================
  Files          10       11       +1     
  Lines         465      498      +33     
  Branches        0        1       +1     
==========================================
+ Hits          349      354       +5     
- Misses        116      144      +28

Impacted Files	Coverage Δ
server/src/ins_service.cpp	32.77% <0%> (ø)	:arrow_up:
...evelopers/indoornavigationsystem/MainActivity.java	15.15% <15.15%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 134a74a...3d6e9d6. Read the comment docs.