Updated MooseApp to MooseAppPtr

See merge request nek5000/giraffe!2

This may have been responsible for sporadic failures in the nightly
builds.

Previously, it seems like build artifacts from previous runs (such as
.sch files and logs) were retained.  We need to make sure we have a
clean build.

Reverting a commit of April Novak that is not working properly with this version of Giraffe, to be investiagetd further

TODO: Haven't renamed files yet.

GitLab CI

See merge request !23

Added .gitlab-ci.yml

Fixes to paths in .gitlab-ci.yml

Syntax errors in .gitlab-ci.yml

Fixed URL for .gitlab-ci.yml

Fixed command for update_and_rebuild_libmesh

Debuggin .gitlab-ci.yml: removed LIBMESH_DIR prior to build

Debug gitlab-ci: using stages

Allow failures for bootstrap in CI

Debugging bootstrap

Debugging bootstrap in CI

Debugging bootstrap in CI

Debugging bootstrap in CI

Fixed bootstrap in CI.  Re-enabling libmesh install

Debug CI: with stages

Debug CI: with stages

Debug CI: stages with libmesh enabled

Debug CI: Changed Git strategy

Increased number of GNU make threads to 8

Reduced nsteps in integration_example.rea for testing

Added build status badge to README.md

Compute area nek expansion

See merge request !18

Deleted Git submodule for moose

Closes #5

See merge request !20

Corrected heat flux in user object. Refs #6

See merge request !17

comment for the pl_leg function says that it returns 0 if n exceeds the maximum Legendre order, but I don't think this was actually implemented, so I added it. I also changed the Fourier function to by default calculate A for the more common case of n > 0, and only calculate if n=0, instead of the reverse. Refs #8

Makefile fixes

See merge request !16