Merge branch 'terencehill/dynamic_hud' into 'master'

Dynamic hud

- hud_dynamic_follow: HUD moves around following player's movement (effect shared with cl_followmodel, can be enabled independently from it though)
- hud_dynamic_shake: shake the HUD when hurt

See merge request !293

diff --cc defaultXonotic.cfg
Simple merge

diff --cc qcsrc/client/autocvars.qh
Simple merge

diff --cc qcsrc/client/hud/panel/radar.qc
Simple merge

diff --cc qcsrc/client/hud/panel/weapons.qc
Simple merge

diff --cc qcsrc/client/main.qc
Simple merge

diff --cc qcsrc/client/view.qc
Simple merge