Fix links to rule guides

Author: chadhietala

lib/rules/no-action-cp.js

@@ -3,7 +3,7 @@ const isCPGetter = require('../utils/computed-property');
 
 const SENDERS = ['send', 'sendAction', 'sendEvent', 'Em.sendEvent', 'Ember.sendEvent'];
 
-const MESSAGE = 'Do not send events or actions in Computed Properties. This will cause data flow issues in the application, where the accessing of a property causes some side-effect. You should only send actions on behalf of user initiated events. Please see the following guide for more infromation: http://github.com/chadhietala/ember-best-practices/files/guides/no-action-cp.md';
+const MESSAGE = 'Do not send events or actions in Computed Properties. This will cause data flow issues in the application, where the accessing of a property causes some side-effect. You should only send actions on behalf of user initiated events. Please see the following guide for more infromation: https://github.com/chadhietala/ember-best-practices/blob/master/guides/rules/no-action-cp.md';
 
 module.exports = {
   meta: {

lib/rules/no-attrs.js

@@ -2,7 +2,7 @@ function isAttrs(node) {
   return node.property.name === 'attrs' && node.object.type === 'ThisExpression';
 }
 
-const MESSAGE = 'Do not use this.attrs. Please see the following guide for more infromation: http://github.com/chadhietala/ember-best-practices/files/guides/no-observers.md';
+const MESSAGE = 'Do not use this.attrs. Please see the following guide for more infromation: https://github.com/chadhietala/ember-best-practices/blob/master/guides/rules/no-attrs.md';
 
 module.exports = {
   meta: {

lib/rules/no-observers.js

@@ -6,7 +6,7 @@ function isObserver(node) {
          || (callee && callee.name === 'observer');
 }
 
-const MESSAGE = 'Do not use observers. Consider using computed properties instead. Please see following guide for more information: http://github.com/chadhietala/ember-best-practices/files/guides/no-observers.md';
+const MESSAGE = 'Do not use observers. Consider using computed properties instead. Please see following guide for more information: https://github.com/chadhietala/ember-best-practices/blob/master/guides/rules/no-observers.md';
 
 module.exports = {
   meta: {

lib/rules/require-dependent-keys.js

@@ -1,4 +1,4 @@
-const MESSAGE = 'Do not use Computed Properties without dependent keys. Please see following guide for more information: http://github.com/chadhietala/ember-best-practices/files/guides/require-dependent-keys.md';
+const MESSAGE = 'Do not use Computed Properties without dependent keys. Please see following guide for more information: https://github.com/chadhietala/ember-best-practices/blob/master/guides/rules/require-dependent-keys.md';
 
 function isMissingDependentKeys(name, node, context) {
   if (name === 'computed' && node.arguments.length === 1) {