#61 added .gitattributes
#61 converted all LF files to CRLF
 - moved all binaries out of repo into a temp folder
 - replaced CRLF with LF in all files
 - replaced LF with CRLF in all files
 - moved binaries back into repo
#61 updated CONTRIBUTING.md with new EOL policy
Merge pull request #117 from adamralph/61-eol

#61 added gitattributes and normalised line endings