Merge branch 'create_marks' into 'master'

add .gradle to gitignore

See merge request kmuldoon/student-marks-microservice!4

.gitignore

 #HELP.md
 #.gradle
 build/
+.gradle
 #!gradle/wrapper/gradle-wrapper.jar
 #!**/src/main/**/build/
 #!**/src/test/**/build/