URXVT: termname, font and shading

* Changed urxvt's termname to rxvt-256color, the original one had
    some trouble with certain programs not recognizing that it had 256
    color support.

  * Trying out the Dejavu Sans Mono font.

  * Now that I have random wallpapers again, sometimes texts were
    getting a little hard to read, so I turned down the shading a bit
    to make the texts clearer.

Xdefaults

@@ -6,6 +6,7 @@ urxvt*saveLines:       65535
 urxvt*cursorBlink:     false
 urxvt*cursorUnderline: true
 urxvt*urgentOnBell:    true
+urxvt*termName:        rxvt-256color
 
 ! Extensions
 urxvt*perl-lib:        /usr/lib/urxvt/perl/
@@ -15,12 +16,14 @@ urxvt*matcher.button:  1
 
 ! Appearance
 ! - use a bitmap font
-urxvt*font:       -*-tamsyn-medium-*-*-*-15-*-*-*-*-*-*-*
-urxvt*boldFont:   -*-tamsyn-bold-*-*-*-15-*-*-*-*-*-*-*
+!urxvt*font:       -*-tamsyn-medium-*-*-*-15-*-*-*-*-*-*-*
+!urxvt*boldFont:   -*-tamsyn-bold-*-*-*-15-*-*-*-*-*-*-*
+urxvt*font: xft:DejaVu Sans Mono-10:antialias=true
+urxvt*boldFont: xft:DejaVu Sans Mono-10:style=bold:antialias=true
 ! - cursor
 urxvt*cursorColor: #DCDCCC
 ! - pseudo transparency
-urxvt*shading:     50
+urxvt*shading:     20
 urxvt*transparent: true
 ! - color scheme
 urxvt.background:  #252A2B