more imageinfo text and warnings and cleanup

more imageinfo text

rewrote many examples to fix newly exposed compiler warnings

marked a couple of YUV method bodies as deprecated

also cleaned up line endings to use the linux style

R=bsalomon@google.com
TBR=caryclark@google.com
Docs-Preview: https://skia.org/?cl=112302
Bug: skia:6898
Change-Id: I89626a27353aa84526f9b9475d927bd0e9d8f0d5
Reviewed-on: https://skia-review.googlesource.com/112302
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>
diff --git a/docs/SkIPoint_Reference.bmh b/docs/SkIPoint_Reference.bmh
index 11a6cdc..66f04e5 100644
--- a/docs/SkIPoint_Reference.bmh
+++ b/docs/SkIPoint_Reference.bmh
@@ -176,7 +176,7 @@
 #Example
 SkIPoint test[] = { {0, -0}, {-1, -2},
                    { SK_MaxS32, SK_MinS32 },
-                   { SK_NaN32, -SK_NaN32 } };
+                   { SK_NaN32, SK_NaN32 } };
 for (const SkIPoint& pt : test) {
     SkIPoint negPt = -pt;
     SkDebugf("pt: %d, %d  negate: %d, %d\n", pt.fX, pt.fY, negPt.fX, negPt.fY);