Disable the fixed tuple count config parameter for YCSB
Disable JVM asserts by default. Enable blocking clients by default
A couple of things here:

(1) We now only build the anticaching component in the EE if the HStoreConf 'site.anticache_enable' feature is enabled. This was for @jdebrabant

(2) Likewise, you can now pass in from the commandline whether you want the reversible LRU chain in the anti-cache

(3) Added initial code to get @jarulraj started on building out the mmap version of H-Store's storage manager.
Decided to enable anti-caching compilation by default
Ok now we'll really enable anti-cache compilation by default...
Fixes to make sure that we're not trying to compile the MMAP_STORAGE option in the EE unless we really want. This will fix the valgrind errors