Reconstruction snapshots now include pose and calibration packets, so
that they can actually be reconstructed. Recording options in the
configuration have also been moved from the root to controls.

Reconstruction snapshots are now fixed. The snapshot is taken from the
next complete IFrame, so reconstruction snapshots cannot be taken while
the reconstruction is paused.

Tweaks to improve reconstruct

See merge request nicolas.pope/ftl!193

Player to output FTL stream info

See merge request nicolas.pope/ftl!192

Reconstruction recording can again be started by using the GUI buttons.
Taking a reconstrution snapshot no longer crashes the application, but
it's still not functional.

Warp optimise correspondence search

See merge request nicolas.pope/ftl!191

Implements #263 reconstruction scaling

Closes #263

See merge request nicolas.pope/ftl!190

Resolves #260 scene recording

Closes #260

See merge request nicolas.pope/ftl!189

Implements #261 recon transforms

Closes #261

See merge request nicolas.pope/ftl!188

Resolves #256 Net config refresh

Closes #256

See merge request nicolas.pope/ftl!187

Implements #258 and implements #259 multi group

Closes #258 and #259

See merge request nicolas.pope/ftl!186

Reconstruction now supports multiple groups until rendering. This means
that the scene_A and scene_B variables are now vectors. To support this
change, a bug was fixed in configuration.cpp. Previously, instead of
adding multiple paths, the configure() method simply added the same path
multiple times. Now all paths are correctly added to the configuration.

Holoportation blue tint effect

See merge request nicolas.pope/ftl!185

Implements #257 merger app

Closes #257

See merge request nicolas.pope/ftl!184

- The file extension is now chosen based on the chosen recording type.
- The record button is disabled while the recording window is open,
preventing the user from attempting to start multiple recordings
simultaneously.
- The color of the record button is now also changed to red when the
recording is started from the recording window.
- The available channels are now set as the recording window is opened.

The recording window can now make every type of recording, and can do so
whether the chosen camera is active or not. In the case of virtual
camera recordings, it is necessary to set the chosen camera as the
active camera. The recordings can also be named.

Implements #255 discon support window

Closes #255

See merge request nicolas.pope/ftl!183

Implements #204 pause to use config

Closes #204

See merge request nicolas.pope/ftl!182

Implements #240 custom shortcuts

Closes #240

See merge request nicolas.pope/ftl!181

2D snapshots now have alpha blending between the channels.
3D snapshots have been added, though the feature is not yet functional.
Recording window for detailed options has been added, though it is still
missing most functionality.