[ES] Add 2013-12-17-maintenance-of-1-8-7-and-1-9-2 spanish translation
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).
Merge pull request #483 from sorah/translation-ja/ruby-2-1-0-rc1-is-released

[translation][ja] ruby-2-1-0-rc1-is-released
Merge pull request #482 from JuanitoFatas/2-1-0-rc1-zh_tw

Translate 2.1.0-rc1 is released (zh_tw).
Merge pull request #473 from FerPerales/master

[ES] Add 2013-12-17-maintenance-of-1-8-7-and-1-9-2 spanish translation
Mention about curses in section "Changes from 2.0"
Fix bullet identation
Merge pull request #484 from sorah/fix-ruby210rc1

Improve ruby210rc1 article (en,ja)
http -> https
http => https, use shortcut link syntax of 2.1.0-rc1 is released (zh_tw)