Cleanup HTML syntax issues in manual (e.g., extraneous tags)
Fix some typos in manual
Merge pull request #159 from ericdahl/html-doc-syntax-cleanup

Cleanup HTML syntax issues in manual (e.g., extraneous tags)
Merge pull request #160 from ericdahl/manual-typos

Fix some typos in manual
Update release notes for 1.1.0

Add notes for LOGBACK-926 and LOGBACK-904