Merge branch 'TimePath/entitydebugger' into 'master'

Entity debugger (L merge request)

Entity debugger; displays the source of each entity visually

* `debugdraw 1`: show all visible entities
* `debugdraw 2`: show all logical entities too
* `sv_cmd debugdraw_sv`: send a batch of server entities to player 1

See merge request !248

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

diff --cc qcsrc/common/weapons/weapon/shotgun.qc
Simple merge

diff --cc qcsrc/server/cl_client.qc
Simple merge

diff --cc qcsrc/server/mutators/mutator/gamemode_ctf.qc
Simple merge

diff --cc qcsrc/server/weapons/weaponsystem.qc
Simple merge