Announce Semantic Versioning scheme
Clarify responsibility of PATCH
Use H2 for References section
Use H2 for Thank you section
Clarify maintained branches

Separate comment on tags and releases from branch list
[ES] Add 2013-12-17-maintenance-of-1-8-7-and-1-9-2 spanish translation
Fix a dead link in /ja/documentation (workaround)
Translate news 2013-12-17-maintenance-of-1-8-7-and-1-9-2 into Korean
2013-12-17-maintenance-of-1-8-7-and-1-9-2 (ru)
Merge pull request #480 from razum2um/master

2013-12-17-maintenance-of-1-8-7-and-1-9-2 (ru)
Announce 2.1.0-rc1 release
Add BigDecimal to updated libraries list
Use module constant names in updated libraries list
s/from/since
Link NEWS to v2_1_0_rc1 file on github
Merge pull request #481 from zzak/announce-2-1-0-rc1

Announce 2.1.0-rc1
s/from/since
Make corrections as suggested by @dabit
[translation][ja] ruby-2-1-0-rc1-is-released
Translate 2.1.0-rc1 is released (zh_tw).