Added add-thought to scripts.

I figure that it's useful enough and good enough by this point to be
included.

scripts/add-thought.lua

@@ -0,0 +1,79 @@
+-- Adds thoughts to creatures. Use add-thought -help for more information.
+-- author Putnam
+
+local function addEmotionToUnit(emotions,thought,emotion,severity)
+    if not (type(emotion)=='number') then emotion=df.emotion_type[emotion] end
+    if not (type(thought)=='number') then thought=df.unit_thought_type[thought] end
+    emotions:insert('#',{new=df.unit_personality.T_emotions,
+    type=emotion,
+    unk2=1,
+    unk3=1,
+    thought=thought,
+    subthought=0,
+    severity=severity,
+    flags=0,
+    unk7=0,
+    year=df.global.cur_year,
+    year_tick=df.global.cur_year_tick
+    })
+end
+
+function tablify(iterableObject)
+    t={}
+    for k,v in ipairs(iterableObject) do
+        t[k] = v~=nil and v or 'nil'
+    end
+    return t
+end
+
+
+local utils=require('utils')
+
+validArgs = validArgs or utils.invert({
+ 'unit',
+ 'thought',
+ 'emotion',
+ 'severity',
+ 'gui',
+ 'help'
+})
+
+local args = utils.processArgs({...}, validArgs)
+
+if args.help then
+    print(' add-thought: add a thought to a unit with an associated emotion.')
+    print('  add-thought -gui: opens a gui to add a thought to the selected unit.')
+    print('  add-thought -emotion numOrName -thought numOrName -severity num')
+    print('   adds thought with given thought, emotion and severity to selected unit.')
+    print('   names can be found here:')
+    print('   https://github.com/DFHack/df-structures/blob/master/df.unit-thoughts.xml')
+    print('  add-thought -unit etc.: as two above, but instead of selected unit uses unit')
+    print('  with given ID. (for use with modtools)')
+end
+
+local unit = args.unit and df.unit.find(args.unit) or dfhack.gui.getSelectedUnit(true)
+
+if not unit then qerror('A unit must be specified or selected.') end
+if args.gui then
+    local script=require('gui.script')
+    script.start(function()
+    local tok,thought=script.showListPrompt('emotions','Which thought?',COLOR_WHITE,tablify(df.unit_thought_type),10,true)
+     if tok then
+      local eok,emotion=script.showListPrompt('emotions','Which emotion?',COLOR_WHITE,tablify(df.emotion_type),10,true)
+       if eok then
+        local sok,severity=script.showInputPrompt('emotions','At what severity?',COLOR_WHITE,'0')
+         if sok then
+          addEmotionToUnit(unit.status.current_soul.personality.emotions,thought,emotion,severity)
+         end
+       end
+     end
+    end)
+else
+    local thought = args.thought or 180
+    
+    local emotion = args.emotion or -1
+    
+    local severity = args.severity or 0
+    
+    addEmotionToUnit(unit.status.current_soul.personality.emotions,thought,emotion,severity)
+end