update readme for fork

Author: structuralartistry

README.md

@@ -1,3 +1,23 @@
+FORK NOTES
+
+This is a forked version of this gem to play nice with CentOS 6.7 64 bit.
+
+A pull request that may or may not be generally useful has been sent to the owning repo.
+
+I was getting the following error running the IMGKit gem on Centos:
+
+libjpeg.so.8: cannot open shared object file
+
+For this modified branch, it contains the wkhtmltoimage binary specifically for Centos 6 64bit,
+compiled on Centos 6.6, extracted from the rpm package at http://wkhtmltopdf.org/downloads.html.
+
+I finally just pulled the rpm package from http://wkhtmltopdf.org/downloads.html for CentOS 6.6, pulled it apart and substituted the binary and found it working.
+
+Also was hitting error with the lsb_version check so added a thrown error if that command fails so at least it would be easier for someone to fix the issue (ie adding the package containing that command).
+
+
+ORIGINAL README
+
 Provides linux and Mac binaries for wkhtmltoimage.
 
 Uses the current Version of wkhtmltoimage (LGPL)