this is about code quality and more specific tools such are Checkstyle
and Spotbugs

Move to single point of definition for the template parts by using
include instead of the inline content

The template allows to quicly start a presentation
that makes use of the include directive to get the header and footer
relevant to the NTNU theme

* remove leftover text from a git conflict
* change the presentation to include the header and footer

Supprorting material with administrative issues slides

Supporting slides for the git demo lecture

Presentations including the footer should set the LECTURE_TOPIC
LECTURE_NO attributes so that the proper information is displayed
in the footer area of the presentation.

Example:
:LECTURE_TOPIC: Git demo
:LECTURE_NO: 4th lecture

Merge branch 'lectures2020' of https://gitlab.stud.idi.ntnu.no/it1901/course-material into lectures2020

slides
Header and footer includes have been added

Merge branch 'lectures2020' of https://gitlab.stud.idi.ntnu.no/it1901/course-material into lectures2020

Merge branch 'issue-11-allow-user-to-enter-and-update-metadata-about-the-latlong-points' into 'master'

Issue 11 allow user to enter and update metadata about the latlong points

Closes #10 and #11

See merge request !6

changed isCustomProperty to static
minor changes for formatting