Candidate for 2.5.0 release changelog
Fix json formatting of printlog to be valid json
Fix compile warnings as errors
Spelling.
Merge pull request #1514 from markbenvenuto/printlog_json

Fix json formatting of printlog to be valid json
Minor cleanup: unused variables, KNF.

refs #1514
Merge branch 'develop' into 2.5.0-release
Minor edits of the changelog.
Spelling.
Cut 2.5.0 release
Merge pull request #1512 from wiredtiger/2.5.0-release

Candidate for 2.5.0 release changelog
Bump release version number on develop to 2.5.1