terminal: use xfce4-terminal

While rxvt-unicode is great, it doesn't support xsettings making it
difficult to use when DPI can change while running.

Xresources

@@ -1,50 +0,0 @@
-!! Colors, stolen from http://xcolors.net/dl/derp
-*color0:   #111111
-*color8:   #666666
-*color1:   #d36265
-*color9:   #ef8171
-*color2:   #aece91
-*color10:  #cfefb3
-*color3:   #e7e18c
-*color11:  #fff796
-*color4:   #5297cf
-*color12:  #74b8ef
-*color5:   #963c59
-*color13:  #b85e7b
-*color6:   #5E7175
-*color14:  #A3BABF
-*color7:   #bebebe
-*color15:  #ffffff
-
-!! rxvt configuration
-URxvt.foreground: white
-URxvt.background: rgba:0000/0000/0000/dddd
-URxvt.cursorColor: green
-URxvt.depth: 32
-URxvt.cursorBlink: False
-URxvt*colorIT: #ff7f00
-
-URxvt.scrollBar: False
-URxvt.scrollTtyOutput: False
-URxvt.scrollTtyKeypress: True
-URxvt.scrollWithBuffer: True
-URxvt.jumpScroll: True
-URxvt.skipScroll: True
-URxvt.saveLines: 5000
-
-!! To get this font, use the font patcher from https://github.com/Lokaltog/vim-powerline
-!! To get a smaller version of this font, use:
-!!
-!!                        # Remove most glyphs
-!!                        for glyph in target_font.glyphs():
-!!                                if glyph.unicode not in range(32,64):
-!!                                        target_font.removeGlyph(glyph)
-URxvt.font: xft:DejaVu Sans Mono-8,xft:DejaVu Sans Mono for Powerline-8
-URxvt.letterSpace: -1
-
-URxvt.iso14755: False
-
-!URxvt.perl-lib: ...
-URxvt.perl-ext-common: default,-option-popup,-selection-popup,font-size
-URxvt.keysym.C-equal: perl:font-size:increase
-URxvt.keysym.C-minus: perl:font-size:decrease