[moretrees & columnia] Update and fix reference to acacia tree

- For #429

mods/moretrees/description.txt

@@ -0,0 +1 @@
+This mod adds a whole bunch of new types of trees to the game

mods/moretrees/init.lua

@@ -2,13 +2,13 @@
 --
 -- This mod adds more types of trees to the game
 --
--- Some of the node definitions and textures came from cisoun's conifers mod
+-- Some of the node definitions and textures came from cisoun's conifers mod 
 -- and bas080's jungle trees mod.
 --
 -- Brought together into one mod and made L-systems compatible by Vanessa
 -- Ezekowitz.
 --
--- Firs and Jungle tree axioms/rules by Vanessa Ezekowitz, with the
+-- Firs and Jungle tree axioms/rules by Vanessa Ezekowitz, with the 
 -- latter having been tweaked by RealBadAngel, most other axioms/rules written
 -- by RealBadAngel.
 --

mods/moretrees/mod.conf

@@ -0,0 +1 @@
+name = moretrees