Write benchmark output to separate files per test+metric. Support Lloyd Hilaiel's GC.heap_info patch for current heap size.

Force runs to be an integer. Start and stop RubyProf in same scope. Expect memory measurements in fractional KB now instead of bytes. Convert object allocation measurements to integer. Wrap up measure_mode in Metric instance method.

Ruby 1.9 compat: instance_methods are symbols instead of strings. Use the quicker instance_method(sym) rescue false check.

Revert "Ensure MemCacheStore is required when using CompressedMemCacheStore since they are lazy load now."

This reverts commit dd4181f4.

This reverts commit 19895f08.

Fix doc typo. Move extend self so it's more immediately obvious. Require inflections from load path.