Fix url_for with no arguments when default_url_options is not explicitly defined. [#339 state:resolved]
Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

Signed-off-by: NPratik Naik <pratiknaik@gmail.com>

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.