Adding 1.4.0 GA release notes.
Merge pull request #112 from daschl/1.4-2

Adding 1.4.0 GA release notes.
Merge pull request #113 from mnunberg/stage

libcouchbase: Update homebrew instructions
Java SDK: release version 1.4.0
archive-index: add Java SDK 1.3 to archive list
C SDK: update download link in version 1.0 doc (CCBC-366)
Ruby SDK: add release notes for version 1.3.7
add sizing calculator
CCBC-388: Add some missing fixed bugs from release notes