Add mplayer to install by default; switch hostname

+ Add mplayer to `make install`
* Switch `arkady` to `saxifrage`
- Remove dumb finger alias
add term to bash; remove vim's tab autoconvert

+ Bash is now `linux` by default, as `st-256color` doesn't play nice with most
  things
- Commented out vim's `set autoexpand`, tabs no longer transparently convert to
  spaces
change `linux` to `xterm`

Having `linux` as one's `TERM` causes a lot of issues, it seems.
add subtitle fontsize to mplayer
Add alias for pdfviewer; add history tweaks
++