Added Stone to Flesh to Druid/Cleric Spellbooks (#4298)

Druids and clerics will have the ability to petrify their victims temporarily, something that was previously reserved to battlemages for reasons that didn't really make sense to me.

code/modules/spells/spellbook/cleric.dm

@@ -19,6 +19,7 @@
 				/spell/targeted/mend = 							1,
 				/spell/targeted/genetic/blind = 				1,
 				/spell/targeted/shapeshift/baleful_polymorph = 			1,
+				/spell/targeted/flesh_to_stone =                        1,
 				/spell/targeted/projectile/dumbfire/stuncuff = 			1,
 				/spell/targeted/ethereal_jaunt = 				2,
 				/spell/aoe_turf/knock = 					1,

code/modules/spells/spellbook/druid.dm

@@ -21,6 +21,7 @@
 				/spell/targeted/equip_item/seed = 				1,
 				/spell/aoe_turf/disable_tech = 					1,
 				/spell/targeted/entangle = 					1,
+				/spell/targeted/flesh_to_stone =                        1,
 				/spell/aoe_turf/conjure/grove/sanctuary = 			1,
 				/spell/aoe_turf/knock = 					1,
 				/spell/targeted/shapeshift/avian = 			1,

html/changelogs/Changelog-Takenforgranite.yml

@@ -0,0 +1,37 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#################################
+
+# Your name.  
+author: Kaedwuff
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - rscadd: "Druid and Cleric wizards can now take their victims for granite."