Lagrange [release]

Added a key binding mechanism

Fri Oct 30 09:08:09 2020 +0200

The document scrolling keys are now handled via bindings.

 CMakeLists.txt          |   1 +
 src/app.c               |  10 +++-
 src/ui/documentwidget.c |  75 +++++++++++------------
 src/ui/keys.c           | 154 ++++++++++++++++++++++++++++++++++++++++++++++++
 src/ui/keys.h           |  17 +++++-
 5 files changed, 215 insertions(+), 42 deletions(-)