Merge to master to test build stage in pipeline

See merge request !4

# Conflicts:
#   .gitlab-ci.yml

Merge current test progress to staging

See merge request !3

Add the ability for User to register, Admin to set coordinator role and see TA's calendar with permission

Make Project to Use Gradle

See merge request !2

# Conflicts:
#   README.md

Iteration 2

See merge request !1