Version 0.2b - Added method to hide API Key

This follows incorrect Semantic Versioning, but for sake of no confusion, using the versioning as before.

Changelog v0.2b

Grp repo is ready for sync! @liewchooichin @vincentnwa @JoshuaEmmanuel7

I'm not merging Vincent's pull request yet as it is an old commit.
Not wise to do 2 pull requests at same time for each version. Each version will be for one pull request's changes made, so it's more organized.

In v0.2b, the hide ApiKey method Sanjela showed has been added. You can now hide your ApiKey. You have to setup the Springboot environment variable first.

=== Files added or edited ===
BusApiApplication.java [Edited, added a logger.info line to print a message when Springboot app starts]

ApiTestController.java [Edited - removed extra import]

AppBusServiceController.java [Edited - added back the find all bus service GetMapping for testing purposes]
AppBusStopController.java [Edited - added back the find all bus stop GetMapping for testing purposes]

GlobalExceptionHandler [Edited - added one logger.error line]

ApiKey.java [Edited - changed it to use new method to get ApiKey]

AppBusArrivalService.java [Edited - now uses new method to get ApiKey]
BusRouteApiService.java [Edited - now uses new method to get ApiKey]
BusServiceApiService.java [Edited - now uses new method to get ApiKey]
BusStopApiService.java [Edited - now uses new method to get ApiKey]

MainBusRouteController.java [NEW]
MainBusServiceController.java [NEW]
MainBusStopController.java [NEW]

MainBusRouteApiService.java [NEW]
MainBusServiceApiService.java [NEW]
MainBusStopApiService.java [NEW]

MainBusRouteApiServiceImpl.java [NEW]
MainBusServiceApiServiceImpl.java [NEW]
MainBusStopApiServiceImpl.java [NEW]

application.properties [Edited - added Logger Configuration, and it is commented out. To always comment out Logger configuration part before git add -A or git push]

.gitignore [Corrected - "log/" changed to "logs/" to be correct and match folder name that logger configuration use

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