CLI is broken, hangs on "Rendering afix..."

[zbanks]

This was probably related to #96? It'd be good to fix this again (and remake the effect library HTML page)

> ./radiance -o output -m cli.json -a
System library path is: "/home/zbanks/radiance_dj/resources/library/"
User library path is: "/home/zbanks/.local/share/Radiance/Radiance/library"
System config path is: "/home/zbanks/radiance_dj/resources/config/"
User config path is: "/home/zbanks/.local/share/Radiance/Radiance/config"
QML path is: "/home/zbanks/radiance_dj/resources/qml/"
GLSL path is: "/home/zbanks/radiance_dj/resources/glsl/"
ALSA lib pcm_dsnoop.c:606:(snd_pcm_dsnoop_open) unable to open slave
ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_dmix.c:1029:(snd_pcm_dmix_open) unable to open slave
Successfully loaded image  "/home/zbanks/radiance_dj/resources/library/images/nyancat.gif"  with  12 frames, and a total delay of  1200 ms
Loaded model: "cli.json"
QJsonObject({"edges":[{"fromVertex":1,"toInput":0,"toVertex":4},{"fromVertex":2,"toInput":1,"toVertex":4},{"fromVertex":5,"toInput":0,"toVertex":3},{"fromVertex":4,"toInput":0,"toVertex":0},{"fromVertex":0,"toInput":0,"toVertex":5}],"vertices":[{"file":"effects/afixhighlight.glsl","frequency":0,"intensity":1,"type":"EffectNode"},{"file":"images/nyancat.gif","type":"ImageNode"},{"file":"effects/test.glsl","frequency":0,"intensity":0.7,"type":"EffectNode"},{"type":"FFmpegOutputNode"},{"inputCount":2,"role":"","type":"PlaceholderNode"},{"file":"effects/onblack.glsl","frequency":0,"intensity":1,"type":"EffectNode"}]})
Scanning for effects in path: "/home/zbanks/radiance_dj/resources/library/"
Rendering: "afix"