Moodle sample updates

- Updated the community files sample. The community files sample has been changed so that, as the user selects a community, a list of files for the given community is displayed, alongside the option to upload files

- Refactored the proxy. Extracted methods into the proxy helper.

- Removed the logout button.

- Updated version info.

- Modified the files view so that user can now select the file type to display.

- Fixed typo in block name