Towards the first release

- Fixed reference link bugs in news and featured posts. Note, to not have '…' in truncate liquid filter, must supply empty string as second argument. {{ […] | truncate: 5 , '' }}. In other posts it may also be recommendable to have a reference section auto generated.
- Added post limit variable in Rakefile to allow testing small number of post.
- Rakefile also works locally now.
- build and serves now use --future options and --drafts options for local and gorilla build/serves. Also added --detach for gorilla build.
- different builds for webpage on ccs (http://rccp.tsukuba.ac.jp/Astro), gorilla, github.io, and localhost, all using different config file with different postfixes. The Rakefile reads only relevant information from _config.yml (the one without a postfix)
- added an auto generated sitemap.xml. Not sure this is correct, though.
- added a favicon
- started some drafts for SMBH conference.