Rename "Primer.md" to "primer.md" and adjust links. Part of the documentaion rationalzation

googletest/docs/AdvancedGuide.md

@@ -1,6 +1,6 @@
 
 
-Now that you have read [Primer](Primer.md) and learned how to write tests
+Now that you have read [Primer](primer.md) and learned how to write tests
 using Google Test, it's time to learn some new tricks. This document
 will show you more assertions as well as how to construct complex
 failure messages, propagate fatal failures, reuse and speed up your

googletest/docs/Documentation.md

@@ -4,7 +4,7 @@ current git version)**
 documentation for that specific version instead (e.g. by checking out
 the respective git branch/tag).**
 
-  * [Primer](Primer.md) -- start here if you are new to Google Test.
+  * [Primer](primer.md) -- start here if you are new to Google Test.
   * [Samples](Samples.md) -- learn from examples.
   * [AdvancedGuide](AdvancedGuide.md) -- learn more about Google Test.
   * [XcodeGuide](XcodeGuide.md) -- how to use Google Test in Xcode on Mac.

googletest/docs/FAQ.md

@@ -1,7 +1,7 @@
 
 
 If you cannot find the answer to your question here, and you have read
-[Primer](Primer.md) and [AdvancedGuide](AdvancedGuide.md), send it to
+[Primer](primer.md) and [AdvancedGuide](AdvancedGuide.md), send it to
 googletestframework@googlegroups.com.
 
 ## Why should I use Google Test instead of my favorite C++ testing framework? ##
@@ -956,7 +956,7 @@ using gtest-md.vcproj instead of gtest.vcproj.
 
 ## I put my tests in a library and Google Test doesn't run them. What's happening? ##
 Have you read a
-[warning](Primer.md#important-note-for-visual-c-users) on
+[warning](primer.md#important-note-for-visual-c-users) on
 the Google Test Primer page?
 
 ## I want to use Google Test with Visual Studio but don't know where to start. ##