Develop share route

[ClaraMirandaGarcia]

Basic functionalities for sharing a route added:

• A system to send/retrieve notifications
• A system to enable/disable permissions
• A system to retrieve all the shared routes
• A system to share a route

[codecov[bot]]

Codecov Report

Merging #160 into develop will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #160   +/-   ##
========================================
  Coverage    36.09%   36.09%           
========================================
  Files           72       72           
  Lines         1147     1147           
  Branches       117      117           
========================================
  Hits           414      414           
  Misses         657      657           
  Partials        76       76           

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[ClaraMirandaGarcia]

This pull request aims the issue #120