changes style
doesn't apply turbolink to download a file

fix bug: download link cause a browser to crash in production environment.
add keymaster and keymaster.sequence
fills content-length header intentionally
use haml for layout
enable to set title
programs#show yields title
add shortcuts
prints the messages and the stacktrace on exception
epg info length can be bigger than 1
signs like【デ】 can be included in the front of a title
ts file sometimes has no HD stream
the ffmpeg output sometimes includes UTF-8 invalid byte sequence
Merge branch 'feature/shortcuts' of https://github.com/shouichi/tv-broadcast
Merge branch 'feature/title-in-show-page' of https://github.com/shouichi/tv-broadcast
maps a stream iff it's of the specified channel
sanitize wide tilde chars, which are different between win and mac
rescues exception only in registration script
adds acceleration/deceleration shortcuts
play/pause with space key