Fix whitespace issues in rst files

Compile.rst

@@ -153,12 +153,12 @@ Snow Leopard Changes
 ====================
 
 1. Add a step 6.2a (before Install XML::LibXSLT)::
-	In a separate Terminal window or tab, run:
+    In a separate Terminal window or tab, run:
-	``sudo ln -s /usr/include/libxml2/libxml /usr/include/libxml``
+    ``sudo ln -s /usr/include/libxml2/libxml /usr/include/libxml``
 
 2. Add a step 7a (before building)::
-	In <dfhack directory>/library/LuaTypes.cpp, change line 467 to 
+    In <dfhack directory>/library/LuaTypes.cpp, change line 467 to
-		``int len = strlen((char*)ptr);``
+        ``int len = strlen((char*)ptr);``
 
 Yosemite Changes
 ================

Readme.rst

@@ -1323,7 +1323,7 @@ Subcommands that persist until disabled or DF quit:
                             category when discussing an import agreement with the liaison
 :manager-quantity:          Removes the limit of 30 jobs per manager order
 :civ-view-agreement:        Fixes overlapping text on the "view agreement" screen
-:nestbox-color:		    Fixes the color of built nestboxes
+:nestbox-color:       Fixes the color of built nestboxes
 :eggs-fertile:        Displays a fertility indicator on nestboxes
 :max-wheelbarrow:     Allows assigning more than 3 wheelbarrows to a stockpile
 :tradereq-pet-gender: Displays pet genders on the trade request screen

travis/lint.py

@@ -1,7 +1,7 @@
 import re, os, sys
 
 valid_extensions = ['c', 'cpp', 'h', 'hpp', 'mm', 'lua', 'rb', 'proto',
-                    'init', 'init-example']
+                    'init', 'init-example', 'rst']
 path_blacklist = [
     '^library/include/df/',
     '^plugins/stonesense/allegro',