fix temporarily missing schema after upgrade from pre-1.1.5
patch by Marcus Eriksson; reviewed by jbellis for CASSANDRA-5061
Fix ALTER TABLE overriding compression options with defaults;
patch by Aleksey Yeschenko, reviewed by Jonathan Ellis for
CASSANDRA-4996
Update version, news and changelog for 1.1.8
Fix compression options validation

patch by slebresne; reviewed by iamaleksey for CASSANDRA-5066
fix multithreaded compaction deadlock
patch by Carl Yeksigian; reviewed by jbellis for CASSANDRA-4492
add close method to EchoedRow
add one more compactedRow.close on empty (#4492)
fix specifying and altering crc_check_chance;
patch by Marcus Eriksson and Aleksey Yeschenko, reviewed by Aleksey
Yeschenko for CASSANDRA-5053
Don't expire columns sooner than they should with 2ndary indexes

patch by amorton; reviewed by slebresne for CASSANDRA-5079
formatting
Improve handling a changing target throttle rate mid-compaction
patch by J.B. Langston; reviewed by jbellis for CASSANDRA-5087
improve validation for start key, end token ranges
patch by jbellis; reviewed by dbrosius for CASSANDRA-5089