Install CPUMiner 2.4 on Ubuntu 14.04

CPUMiner is a multi-threaded, highly optimized CPU miner for Litecoin, Bitcoin and other cryptocurrencies. Currently supported algorithms are SHA-256d and scrypt(1024, 1, 1). It supports the getwork mining protocol as well as the Stratum mining protocol, and can be used for both solo and pooled mining. Features Highly optimized for x86, x86-64 and ARM architectures Automatically uses SSE2, AVX and AVX2 instructions where available Supports the Stratum mining protocol Lightweight, only depends on libcurl and jansson Tested on a wide variety of operating systems, including Windows, Linux, OS X, a few BSDs, Solaris and AIX Install CPUMiner 2.