New methods to retrieve Processor architecture and CPU flags from /proc

added methods get_proc_arch and get_cpu_flags to Sys::Statistics::Linux::SysInfo, including Pod
added TEST_REQUIRES to Makefile.PL (the tests with List::BinarySearch are optional anyway)
added test_requires to Build.PL (the tests with List::BinarySearch are optional anyway)
remove Makefile (should be ignored by git anyway)
added 010-linux.t to test Sys::Statistics::Linux since that was being done in 010-sysinfo.t
updated 010-sysinfo.t to test Sys::Statistics::Linux::SysInfo class, new methods tests included