update leveldb to 1.5
update snappy to r65
add compact range
add compact range
updated leveldb and snappy 10 July, 2012
update leveldb on 14 August, 2012
changed Version to 0.4.2
remove leveldb and snappy source files.
add LICENSE in source files.
Merge branch 'master' of github.com:forhappy/cpy-leveldb