Save the excluded motor manufacturers in the preferences when they are
changed.
Fix layout in plot dialog introduced with new MigLayout library.
Remove unused imports
Fix layout issues.
Protect against possible NPEs.
Updated French translations from Boris.
New Spanish and Chinese translations.
Merge pull request #168 from kruland2607/master

Various bug fixes and updated translations.
Photo-booth files copied to the split version of OR.
I HOPE I didn't miss anything!
Clear some warnings
Fix GL invalid state error in sparks - can't change point size there!
Give smoke quads random rotation to reduce artifacts from repitition
Slightly improved sparks
When importing a rkt file, if we cannot find the decal image file on the
local disk, we just ignore it.
Merge pull request #169 from kruland2607/master

When importing a rkt file, if we cannot find the decal image file on the local disk, we just ignore it.
Added new startup flag openrocket.debug.layout which when set, shows
boxes around all the components in miglayout.  Hopefully this will help
fix various layout issues in the applicaiton.
Simplify flame functions by breaking settings into a separate interface
Will also be cleaner to do per-motor flame someday.
Add spark concentration & weight options
Weight does not work great, lines are not the right thing to use.
Add light from flame to smoke.
Make photo more suitable for launching from OR UI