feat add changelog generation support

.changelogrc

@@ -0,0 +1,53 @@
+{
+    "app_name": "",
+    "logo": "",
+    "intro": "",
+    "branch" : "master",
+    "repo_url": "https://github.com/Unitech/pm2",
+    "version_name" : "v2.9.2",
+    "tag": "2.9.1",
+    "file": "currentTagChangelog.md",
+    "template": "template.md",
+    "sections": [
+        {
+            "title": "Bug Fixes",
+            "grep": "^fix"
+        },
+        {
+            "title": "Features",
+            "grep": "^feat"
+        },
+        {
+            "title": "Documentation",
+            "grep": "^docs"
+        },
+        {
+            "title": "Breaking changes",
+            "grep": "BREAKING"
+        },
+        {
+            "title": "Refactor",
+            "grep": "^refactor"
+        },
+        {
+            "title": "Style",
+            "grep": "^style"
+        },
+        {
+            "title": "Test",
+            "grep": "^test"
+        },
+        {
+            "title": "Chore",
+            "grep": "^chore"
+        },
+        {
+            "title": "Branchs merged",
+            "grep": "^Merge branch"
+        },
+        {
+            "title" : "Pull requests merged",
+            "grep": "^Merge pull request"
+        }
+    ]
+}

.gitignore

@@ -1,6 +1,5 @@
 /node_modules
 *.log
-*.log
 *.pid
 test/child
 *.iml
@@ -15,3 +14,4 @@ package-lock.json
 .DS_Store
 *.swp
 *.swo
+currentTagChangelog.md

template.md

@@ -0,0 +1,13 @@
+<% if(logo) { %><img width="710px" src="<%= logo %>" alt="pm2 logo" /> <% } %>
+<% if(logo) { %># <%= title %> <% } %>
+<% if(intro) { %><%= '\n' %><%= intro %><%= '\n' %><% } %> 
+<% if(version && (version.name || version.number)) { %>##<% if(version.name){%> <%= version.name %><% } %> <% if(version.date){ %>( <%= version.date %> )<% } %><%= '\n' %><% } %>
+<% _.forEach(sections, function(section){ 
+  if(section.commitsCount > 0) { %>
+## <%= section.title %>
+<% _.forEach(section.commits, function(commit){ %>  - <%= printCommit(commit, true) %><% }) %>
+<% _.forEach(section.components, function(component){ %>  - **<%= component.name %>**
+<% _.forEach(component.commits, function(commit){ %>    - <%= printCommit(commit, true) %><% }) %>
+<% }) %>
+<% } %>
+<% }) %>