Prevent debug spam on expected failures of item spawn.
Revert an ill-advised revert of a bug fix.

This reverts commit bf82319c1e3f828a055cedf93d7f9c48594aaf66.
Add a stack_size field to ammo and comestibles, defaulting to the starting number of charges.
Update JSON info documentation.
Make ammo stack_size consistent for each caliber, and meds' stack_size so that pills take up far less volume.
Remove unused bionic fake ammos.
Use unified ammo and gun effects in shoot_monster().
Apply bounce effect on hit whether it does damage or not to avoid infinite loops when the shot cannot damage a target.
Merge branch 'pr/3023'
changed from debugmsg to dbg(D_INFO)
Merge branch 'pr/3050'
Merge branch 'pr/3023'
Pull in latest translations from Launchpad.
Merge more configurable stack sizing and latest translations.
Update changelog, motd, and versioning for release 0.8.
Update translation line numbers in .pot.