move .rst to docs

BUG=
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1562543002 .

Patch from Reed Kotler <rkotlerimgtec@gmail.com>.
diff --git a/.gitignore b/.gitignore
index 8cda9be..6c5964a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,5 +10,5 @@
 # Ignore specific patterns at the top-level directory
 /pnacl-sz
 /build/
-/docs/
+/docs/html/
 /crosstest/Output/
diff --git a/DESIGN.rst b/DESIGN.rst
new file mode 120000
index 0000000..d0f7162
--- /dev/null
+++ b/DESIGN.rst
@@ -0,0 +1 @@
+docs/DESIGN.rst
\ No newline at end of file
diff --git a/Makefile.standalone b/Makefile.standalone
index 64f47f6..402a9d0 100644
--- a/Makefile.standalone
+++ b/Makefile.standalone
@@ -517,4 +517,4 @@
 	rm -rf pnacl-sz *.o $(OBJDIR) $(SB_OBJDIR) build/pnacl-sz.bloat.json
 
 clean-all: clean
-	rm -rf build/ docs/
+	rm -rf build/ docs/html
diff --git a/README.rst b/README.rst
new file mode 120000
index 0000000..cffceba
--- /dev/null
+++ b/README.rst
@@ -0,0 +1 @@
+docs/README.rst
\ No newline at end of file
diff --git a/ALLOCATION.rst b/docs/ALLOCATION.rst
similarity index 100%
rename from ALLOCATION.rst
rename to docs/ALLOCATION.rst
diff --git a/DESIGN.rst b/docs/DESIGN.rst
similarity index 100%
rename from DESIGN.rst
rename to docs/DESIGN.rst
diff --git a/LOWERING.rst b/docs/LOWERING.rst
similarity index 100%
rename from LOWERING.rst
rename to docs/LOWERING.rst
diff --git a/README.rst b/docs/README.rst
similarity index 100%
rename from README.rst
rename to docs/README.rst