Revert "add require-dev to load PHPUnit tests and lxer/parser generator"

This reverts commit f3d7b05ccb.

README.md

@@ -4,6 +4,8 @@
 *Read the NEW_FEATURES file for recent extensions to Smarty 3.1 functionality*
 
 Smarty packages are now on github and can be installed with Composer.
+ 
+**NOTE: Because of this change you must clear your local composer cache with the "composer clearcache" command**
 
 The "smarty/smarty" package will start at libs/....   subfolder.
 
@@ -29,6 +31,3 @@ For a specific version use something like
     }
 
 Composer can also be used for Smarty2 versions 2.6.24 to 2.6.28
-
-Starting with version 3.1.22 a "require-dev" section has been added in commposer.json
-to load the PHPUnit test and the lexer/parser generator,