[docs] fixes broken image link

Author: jgrewe

docs/data_model.md

@@ -13,7 +13,7 @@ allowing interoperability, and being customizable. The model defines
 four entities (Property, Section, Value, RootSection) who's relations
 and elements are shown in the figure below.
 
-![odml_logo](./images/erModel..png "odml data model")
+![odml_logo](./images/erModel.png "odml data model")
 
 Property and Section entities are the core of the odml. A Section
 contains Properties and can further have subsection thus building a

docs/index.md

@@ -1,7 +1,6 @@
 # odml
 
 <img src="./images/odMLLogo.png" alt="odml" style="width: 150px;"/>
-<!-- ![odml_logo](./images/odMLLogo.png "odml") -->
 
 odML (open metadata Markup Language) is an [data model](./data_model.md) for storing
 arbitrary metadata. Teh underlying datamodel offers a way to store