Remove remainder of usr/dsymonds.

R=rsc,r
APPROVED=r
DELTA=685  (275 added, 409 deleted, 1 changed)
OCL=35810
CL=35933

R=rsc
DELTA=5  (0 added, 4 deleted, 1 changed)
OCL=35930
CL=35930

base85 -> encoding/ascii85, encoding/git85
debug/binary -> encoding/binary

R=r
DELTA=3190  (1884 added, 1297 deleted, 9 changed)
OCL=35923
CL=35929

also fix a pedantry in the language design faq.

R=rsc
DELTA=113  (94 added, 16 deleted, 3 changed)
OCL=35922
CL=35928

- operates on stdin, a single file, or all files in a file tree
- setting -w flag writes to (source) file instead of stdout
- setting -l flag lists files whose formatting has changed

R=rsc
DELTA=201  (102 added, 71 deleted, 28 changed)
OCL=35890
CL=35926

Also add git version of base85,
which is what I really wanted but
didn't recognize as different until it
was too late.

R=austin
DELTA=980  (972 added, 4 deleted, 4 changed)
OCL=35580
CL=35921

R=ken
OCL=35920
CL=35920

R=ken
OCL=35919
CL=35919

R=ken
OCL=35917
CL=35917

go/test: passes 88% (304/345)

R=rsc
APPROVED=rsc
DELTA=67  (3 added, 54 deleted, 10 changed)
OCL=35910
CL=35910

R=kaib
DELTA=1262  (1247 added, 7 deleted, 8 changed)
OCL=35907
CL=35909

go/test: passes 87% (303/345)

R=rsc
APPROVED=rsc
DELTA=19  (5 added, 6 deleted, 8 changed)
OCL=35903
CL=35906

R=ken
OCL=35905
CL=35905

R=ken
OCL=35902
CL=35904

go/test: passes 87% (300/343)

R=rsc
APPROVED=rsc
DELTA=125  (125 added, 0 deleted, 0 changed)
OCL=35893
CL=35900

R=ken
OCL=35899
CL=35899

 * bug211
 * embedded interfaces with lowercase methods
 * var _ = f() at top level

R=ken
OCL=35898
CL=35898

also eliminate float80 dregs

R=ken
OCL=35894
CL=35896

R=gri
DELTA=16  (0 added, 16 deleted, 0 changed)
OCL=35892
CL=35895

R=rsc
DELTA=207  (160 added, 42 deleted, 5 changed)
OCL=35854
CL=35887

- specify evaluation order of floating-point expressions as
  discussed
- specify floating point conversion rounding as discussed
- slightly reformatted section on conversions to make it
  more readable (hopefully)
- fixed production for interpreted_string_lit - components
  were not properly tagged before because of """ instead of `"`

R=go-dev
DELTA=83  (41 added, 11 deleted, 31 changed)
OCL=35864
CL=35885

go/test: passes 86% (297/343)

R=rsc
APPROVED=rsc
DELTA=14  (10 added, 1 deleted, 3 changed)
OCL=35881
CL=35884

BUG=2197242
R=r
DELTA=16  (16 added, 0 deleted, 0 changed)
OCL=35878
CL=35882

R=rsc
DELTA=2  (2 added, 0 deleted, 0 changed)
OCL=35874
CL=35880

R=rsc
APPROVED=rsc
DELTA=734  (734 added, 0 deleted, 0 changed)
OCL=35738
CL=35879

R=rsc,r
DELTA=193  (191 added, 0 deleted, 2 changed)
OCL=35849
CL=35877

R=gri
DELTA=17  (17 added, 0 deleted, 0 changed)
OCL=35852
CL=35876

R=rsc
DELTA=11  (9 added, 0 deleted, 2 changed)
OCL=35872
CL=35872

R=rsc
DELTA=51  (48 added, 0 deleted, 3 changed)
OCL=35846
CL=35853

R=rsc
DELTA=20  (20 added, 0 deleted, 0 changed)
OCL=35847
CL=35847

R=rsc
APPROVED=rsc
DELTA=21  (21 added, 0 deleted, 0 changed)
OCL=35845
CL=35845

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=35841
CL=35841

R=rsc
DELTA=128  (104 added, 0 deleted, 24 changed)
OCL=35835
CL=35839

i renamed sys to runtime but didn't remember this file.
(and the darwin build doesn't use it.)

TBR=r
OCL=35826
CL=35826

because they are in package runtime.

another step to enforcing package boundaries.

R=r
DELTA=732  (114 added, 93 deleted, 525 changed)
OCL=35811
CL=35824

a step toward enforcing package boundaries,
necessary to eliminate global package name space.

R=r
DELTA=581  (310 added, 271 deleted, 0 changed)
OCL=35805
CL=35823

R=r
DELTA=4  (2 added, 0 deleted, 2 changed)
OCL=35809
CL=35822

R=rsc
DELTA=189  (118 added, 9 deleted, 62 changed)
OCL=35816
CL=35821

R=rsc
APPROVED=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=35820
CL=35820

R=go-dev
APPROVED=gri
DELTA=1  (1 added, 0 deleted, 0 changed)
OCL=35817
CL=35819