remove calculation of unused  expected compacted filesize
Backport CASSANDRA-6196 to 1.2

patch by Mikhail Stepura; reviewed by Aleksey Yeschenko for
CASSANDRA-6196
Fix harmless NPE in MM/HHOM
Patch by brandonwilliams, reviewed by Tyler Hobbs for CASSANDRA-5185
add ticket number to changes
fix a bunch of typos
add windows bat files for shell commands
patch by sdelmas reviewed by dbrosius for CASSANDRA-6145
Use smaller stack size for tests
Avoid stack overflow on RangeTombstoneList insertion

patch by slebresne; reviewed by frousseau for CASSANDRA-6181
Update changelog
Make LOCAL_ONE the default CL for hadoop
Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-6214
Don't NPE when shutting down non-existent thrift server
Don't require the sysctl file to exist when deleting it
assume python is on path for windows for cqlsh.bat
patch by mstepura reviewed by dbrosius for cassandra-6145
add path to MmappedSegmentedFile assertions
Handle null correctly in CqlStorage
Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-6180
Require logging in for Thrift CQL2/3 statement preparation

patch by Aleksey Yeschenko; reviewed by Sylvain Lebresne for
CASSANDRA-6254
Allow overriding max hin ttl.
Patch by Vishy Kasar, reviewed by brandonwilliams for CASSANDRA-5988
Show the root cause when failing to load a class
Patch by Jackson Chung, reviewed by brandonwilliams for CASSANDRA-6258
restrict max_num_tokens to 1536
patch by jbellis; reviewed by brandonwilliams and Quentin Conner for CASSANDRA-6267
Use non-pooled SegmentedFile builders when bulk loading
Patch by Sam Tunnicliffe, reviewed by brandonwilliams for CASSANDRA-6272