Incorrect production time for batteries

[felixscheffer]

Should be 4 sec, not 5 sec.

https://wiki.factorio.com/Battery

[saibantes]

Similar problem with explosives, crafting time is also 4 s (per craft of 2), not 5s.

Also the timing for all three solid fuel recipes is wrong, it should be 2 s instead of 3 s.