hgweb: add phase to {changeset} template

hgweb: add phase to {changeset} template

It's pretty surprising phase wasn't part of this template call already.
We now expose {phase} to the {changeset} template and we expose this
data to JSON.

This brings JSON output in line with the output from `hg log -Tjson`.
The lone exception is hweb doesn't print the numeric rev. As has been
stated previously, I don't believe hgweb should be exposing these
unstable identifiers. (We can add them later if we really want them.)
There is still work to bring hgweb in parity with --verbose and
--debug output from the CLI.

--- a/mercurial/hgweb/webutil.py	Tue Mar 31 22:35:12 2015 -0700
+++ b/mercurial/hgweb/webutil.py	Tue Mar 31 22:29:12 2015 -0700
@@ -324,6 +324,7 @@
         desc=ctx.description(),
         extra=ctx.extra(),
         date=ctx.date(),
+        phase=ctx.phasestr(),
         files=files,
         diffsummary=lambda **x: diffsummary(diffstatsgen),
         diffstat=diffstats,

--- a/mercurial/templates/json/map	Tue Mar 31 22:35:12 2015 -0700
+++ b/mercurial/templates/json/map	Tue Mar 31 22:29:12 2015 -0700
@@ -11,7 +11,8 @@
   "bookmarks": [{join(changesetbookmark, ", ")}],
   "tags": [{join(changesettag, ", ")}],
   "user": {author|json},
-  "parents": [{join(parent%changesetparent, ", ")}]
+  "parents": [{join(parent%changesetparent, ", ")}],
+  "phase": {phase|json}
   }'
 changesetbranch = '{name|json}'
 changesetbookmark = '{bookmark|json}'

--- a/tests/test-hgweb-json.t	Tue Mar 31 22:35:12 2015 -0700
+++ b/tests/test-hgweb-json.t	Tue Mar 31 22:29:12 2015 -0700
@@ -22,6 +22,7 @@
   $ hg mv foo foo-new
   $ hg commit -m 'move foo'
   $ hg tag -m 'create tag' tag1
+  $ hg phase --public -r .
   $ echo baz > da/foo
   $ hg commit -m 'another commit to da/foo'
   $ hg tag -m 'create tag2' tag2
@@ -162,6 +163,7 @@
       "ceed296fe500c3fac9541e31dad860cb49c89e45",
       "ed66c30e87eb65337c05a4229efaa5f1d5285a90"
     ],
+    "phase": "draft",
     "tags": [
       "tip"
     ],
@@ -185,6 +187,7 @@
     "parents": [
       "8d7c456572acf3557e8ed8a07286b10c408bcec5"
     ],
+    "phase": "public",
     "tags": [
       "tag1"
     ],
@@ -210,6 +213,7 @@
     "parents": [
       "f8bbb9024b10f93cdbb8d940337398291d40dea8"
     ],
+    "phase": "public",
     "tags": [],
     "user": "test"
   }
@@ -231,6 +235,7 @@
     "parents": [
       "06e557f3edf66faa1ccaba5dd8c203c21cc79f1e"
     ],
+    "phase": "draft",
     "tags": [],
     "user": "test"
   }