updating algo 2 files and re-added size info

updated code, need to make a couple changes, but this should run fine
for testing purposes chi.

Added back SizeInfo struct until we decided which way we want to on size
input
git telling me I have to commit these
Merge branch 'master' of https://github.com/ssd-cache/term_project

Conflicts:
	cache_ssd/cache_ssd.cpp