Updated README.md

Author: sergeyklay

README.md

@@ -2,6 +2,18 @@
 
 Zephir Parser delivered as a C extension for the PHP language.
 
+## Get Started
+
+### Linux
+
+On a Unix-based platform you can easily compile and install the extension from sources.
+
+**Requirements**
+
+Prerequisite packages are:
+
+* GCC compiler (Linux/Solaris/FreeBSD) or Xcode (MacOS)
+* [`re2c`](http://re2c.org/) >= 0.13
 
 ## License