fixed some urls in guide; moved elasticsearch png file to proper location, to be…

docs/guide/data-grid.md

@@ -2,7 +2,7 @@ Data grid
 =========
 
 Data grid or GridView is one of the most powerful Yii widgets. It is extremely useful if you need to quickly build admin
-section of the system. It takes data from [data provider](data-provider.md) and renders each row using a set of columns
+section of the system. It takes data from [data provider](data-providers.md) and renders each row using a set of columns
 presenting data in a form of a table.
 
 Each row of the table represents the data of a single data item, and a column usually represents an attribute of

docs/guide/extensions.md

@@ -37,7 +37,7 @@ There should be a `readme.md` file, written in English. This file should clearly
   
   It is a good idea to include some screenshots as part of the documentation, especially if your extension provides a widget. 
   
-It is recommended to host your extensions at [Github](github.com).
+It is recommended to host your extensions at [Github](https://github.com).
 
 Extensions should also be registered at [Packagist](https://packagist.org) in order to be installable via Composer. 
 

extensions/elasticsearch/README.md

@@ -190,7 +190,7 @@ enabled, it is sufficient to just add the panels configuration):
 	// ...
 ```
 
-![elasticsearch DebugPanel](README-debug.png)
+![elasticsearch DebugPanel](images/README-debug.png)
 
 
 Relation definitions with records whose primary keys are not part of attributes

extensions/faker/README.md

@@ -129,7 +129,7 @@ php yii fixture/generate all --templatePath='@app/path/to/my/custom/templates'
 php yii fixture/generate all --fixtureDataPath='@tests/acceptance/fixtures/data'
 ```
 
-You also can create your own data providers for custom tables fields, see [Faker]((https://github.com/fzaninotto/Faker)) library guide for more info;
+You also can create your own data providers for custom tables fields, see [Faker](https://github.com/fzaninotto/Faker) library guide for more info;
 After you created custom provider, for example:
 
 ```php