Merge pull request #91 from shaitan/master

Updates
v0.22.5
Merge pull request #92 from shaitan/master

Caching json statistics
v0.22.6
base: propagate new base creation error to higher level
v0.22.7
write: updated space check functino commit
defrag: merge blobs if blob data size (total-removed) is less than 10% of the max blob size, do not take into account number of records. Print total records, removed records and appropriate sizes in eblob_want_defrag().
v0.22.8
spec: fixed bogus dates
logger: added method for dumping blob config and disk control flags.
core: added defrag_generation counter that is increased each time when blobs are defraged. It is used by code that could have TOC vs TOU race between cache lookup and changing of record.