Rigorously determine line width of Partials

Also begin to transition to using "height" and "width" for number of
rows and number of columns respectively, but keep the old names for now.

Author: acook

lib/remedy/partial.rb

@@ -27,16 +27,17 @@ def last
       lines.last
     end
 
-    def length
+    def height
       lines.length
     end
+    alias_method :length, :height
 
     def width
-      @width ||= lines.max{|line| line.length }.length
+      lines.map{|line| line.length }.max
     end
 
     def size
-      Size.new length, width
+      Size.new height, width
     end
 
     def to_a

lib/remedy/size.rb

@@ -45,11 +45,13 @@ def fits_into? size_to_fit_into
     def rows
       dimensions[0]
     end
+    alias_method :height, :rows
 
     def cols
       dimensions[1]
     end
-    alias :columns :cols
+    alias_method :columns, :cols
+    alias_method :width, :cols
 
     def [] index
       dimensions[index]