remove grequests install dep, modify install instructions

Author: timotheus

INSTALL

@@ -3,11 +3,19 @@ Running the tests:
 
 Installing ebaysdk on Mac, Linux, Unix:
 
-1) Install the SDK with easy_install
+1) Install System Dependancies
+
+   Red Hat:
+   sudo yum install python-lxml
+
+   Ubuntu:
+   sudo apt-get install python-lxml
+
+2) Install the SDK with easy_install
 
    sudo easy_install ebaysdk
 
-   Or you can install the bleeding edge version,
+   Or install the latest version from github,
 
    sudo easy_install https://github.com/timotheus/ebaysdk-python/archive/master.zip
 

setup.py

@@ -41,7 +41,7 @@
     license="COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0",
     packages=find_packages(),
     provides=[PKG],
-    install_requires=['PyYaml', 'lxml', 'requests', 'grequests'],
+    install_requires=['PyYaml', 'lxml', 'requests'],
     test_suite='tests',
     long_description=long_desc,
     classifiers=[