Fixes #93: Use Vector Support Libraries

[brijeshshah13]

Configured the app to use vector support libraries by adding the vectorDrawables element to the build.gradle file in the app module.

[codecov[bot]]

Codecov Report

Merging #96 into master will increase coverage by 11.38%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           master      #96       +/-   ##
===========================================
+ Coverage       0%   11.38%   +11.38%     
===========================================
  Files          46       46               
  Lines        1669     1669               
  Branches      110      110               
===========================================
+ Hits            0      190      +190     
+ Misses       1669     1454      -215     
- Partials        0       25       +25

Impacted Files	Coverage Δ
...oklak/wok/api/twitter/TwitterOAuthInterceptor.java	76.92% <0%> (+76.92%)	:arrow_up:
...ava/org/loklak/wok/api/twitter/UrlEscapeUtils.java	78.57% <0%> (+78.57%)	:arrow_up:

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[singhpratyush]

@brijeshshah13: Please squash the commits. See this for help.

[brijeshshah13]

@singhpratyush Good to go.