Fix grammar in README

Author: sadielbartholomew

README.md

@@ -7,7 +7,7 @@ ES-DOC command line shell
 What is ES-DOC ?
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-ES-DOC stands for Earth Science - Documentation.  It's goal is to provide software tools and services in order to support the distribution of earth science documentation.
+ES-DOC stands for Earth Science - Documentation.  Its goal is to provide software tools and services in order to support the distribution of earth science documentation.
 
 
 What is esdoc-shell ?
@@ -25,7 +25,7 @@ There is a need to support command line programs for streamlining deployments, p
 Who uses esdoc-shell ?
 --------------------------------------
 
-Anyone who wishes to install and use es-doc tools & api's from the command line.
+Anyone who wishes to install and use es-doc tools & APIs from the command line.
 
 
 Installation
@@ -41,4 +41,4 @@ For usage guide to supported commands please refer to  [supported commands docum
 Further Information ?
 --------------------------------------
 
-Please refer to the [splash page](http:es-doc.org) for further information.
+Please refer to the [splash page](http:es-doc.org) for further information.