Move LSM configuration options to be a group in WT_SESSION->create API.

Options used to be lsm_xxx are now lsm=(xxx,xxx,xxx)
Merge branch 'develop' into lsm-config-group

Conflicts:
	dist/api_data.py
Fix indentation issue in test.
Fix configuration parsing in test_util01
Add upgrade documentation for LSM configuration changes.
lines > 80 characters.
lsm_chunk_size -> chunk_size, lsm_chunk_max -> chunk_max, minor change
to error message to match test, it's smaller or equal to, not smaller.
typo in my last change.
lsm_bloom_hash_count -> lsm=(bloom_hash_count)
whitespace
update to match new wtperf threads syntax.
Merge pull request #786 from wiredtiger/lsm-config-group

Move LSM configuration options to be a group in WT_SESSION->create API.