addition of gitattributes, gitignore and README files

.gitattributes

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+* text=auto

.gitignore

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+# Numerous always-ignore extensions
+*.diff
+*.err
+*.orig
+*.log
+*.rej
+*.swo
+*.swp
+*.vi
 *~
+*.sass-cache
+
+# OS or Editor folders
+.DS_Store
+._*
+Thumbs.db
+.cache
+.project
+.settings
+.tmproj
+nbproject
+*.sublime-project
+*.sublime-workspace
+
+# Dreamweaver added files
+_notes
+dwsync.xml
+
+# Komodo
+*.komodoproject
+.komodotools
+
+# Espresso
+*.esproj
+*.espressostorage
+
+# Rubinius
+*.rbc
+
+# Folders to ignore
+.hg
+.svn
+.CVS
+intermediate
+publish
+.idea
+
+# local files
+vendor
+composer.phar
+composer.lock

README.md

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+# phpseclib - PHP Secure Communications Library
+
+MIT-licensed pure-PHP implementations of an arbitrary-precision integer
+arithmetic library, fully PKCS#1 (v2.1) compliant RSA, DES, 3DES, RC4, Rijndael,
+AES, SSH-1, SSH-2, SFTP, and (SVN-only) X.509
+
+* [Download (0.2.2)](https://github.com/phpseclib/phpseclib/zipball/master)
+* [Browse Git](https://github.com/phpseclib/phpseclib)
+* [Documentation](http://phpseclib.sourceforge.net/documentation/)
+* [Support](http://www.frostjedi.com/phpbb/viewforum.php?f=46)
+
+<img src="http://phpseclib.sourceforge.net/pear-icon.png" alt="PEAR Channel" width="16" height="16">
+PEAR Channel: [phpseclib.sourceforge.net](http://phpseclib.sourceforge.net/pear.htm)