0.3.4

Webmon 0.3.4: mod data from a folder; lighter clean-ups; frame timing

• Upload page: "Upload folder" on a playthrough sends a folder chosen on the
  computer (a playthrough folder or a mod folder) file by file, three at a
  time, with progress and Stop; files collect in a staging folder and each
  mod folder sent replaces that mod's data only once all arrived. The page
  skips hidden and temporary files and refuses a folder holding several
  playthroughs; the TV checks every path against the game's storage rules.
  Replaces the .zip upload (miniz removed)
• Memory clean-ups back off while they free little (up to once a minute),
  so steady 3D play with the TV under 160 MB no longer pauses every 5 s;
  near the critical level they stay every 5 s
• Log: renderer, window size and LuaJIT state once; frame rate, slowest
  frame and clean-up time every 15 s
• Menu: PotatoVoxel's debug overlay (F9)