Add test applications for reading from/writing to registration store
Cosmetic updates
Change to use static link to libmemcached
Add bulk writer
Update store-write to use multiple threads, and to allow binary/ascii protocol to be selected at run-time
Fix merge issue
Update store-read to support multiple threads, and retire store-bulk-write
Add millisecond accurate timings to test apps
Merge dev into sto390
Flag uncovered lines in memcachedstore
Merge pull request #159 from Metaswitch/sto390

[Reviewer Matt] Registration store test apps and changes to memcachedstore to support ASCII protocol