Bump rebar to 2.2.0 and add proper release notes
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
new file mode 100644
index 0000000..bdfb3d7
--- /dev/null
@@ -0,0 +1,33 @@
+# Rebar 2.2.0
+## PR's Merged
+* rebar/137: [Filter documented behaviour callbacks](https://github.com/basho/rebar/pull/137)
+* rebar/142: [Fix  rebar_file_utils module on Windows with MSYS](https://github.com/basho/rebar/pull/142)
+* rebar/152: [Allow users to configure skip_deps for specific commands](https://github.com/basho/rebar/pull/152)
+* rebar/154: [Stop applications nicely before killing extra processes](https://github.com/basho/rebar/pull/154)
+* rebar/155: [Fix rebar_utils:expand_env_variable/3](https://github.com/basho/rebar/pull/155)
+* rebar/157: [add native Windows compiler support](https://github.com/basho/rebar/pull/157)
+* rebar/172: [Allow reltool target_dir to be constructed on the fly](https://github.com/basho/rebar/pull/172)
+* rebar/173: [rebar should expand VCS version in the top directory, if possible](https://github.com/basho/rebar/pull/173)
+* rebar/174: [Fixed handle_call response in simplesrv.erl](https://github.com/basho/rebar/pull/174)
+* rebar/177: [Cache vsn information during the run to avoid extra unnecessary shell calls](https://github.com/basho/rebar/pull/177)
+* rebar/179: [Add ebin to the path before compiling erlydtl templates](https://github.com/basho/rebar/pull/179)
+* rebar/183: [Fix compiling DTL templates with latest erlydtl](https://github.com/basho/rebar/pull/183)
+* rebar/184: [Fix for destruction of config app vars on reset](https://github.com/basho/rebar/pull/184)
+* rebar/185: [simple enhance and simple bugfix](https://github.com/basho/rebar/pull/185)
+* rebar/187: [fix for cp_r_win32 where copying a directory to a non-existant directory would crash](https://github.com/basho/rebar/pull/187)
+* rebar/189: [Fix typos in generated cmd script in bootstrap](https://github.com/basho/rebar/pull/189)
+* rebar/190: [Windows xcopy dir to non-existant dir (re-request)](https://github.com/basho/rebar/pull/190)
+* rebar/191: [Fix typos in rebar_templater](https://github.com/basho/rebar/pull/191)
+* rebar/196: [Escape '|' in the Windows runner usage string](https://github.com/basho/rebar/pull/196)
+* rebar/198: [New feature to rebar_xref to allow execution of custom queries.](https://github.com/basho/rebar/pull/198)
+* rebar/199: [Added new feature to rebar xref to allow execution of custom queries.](https://github.com/basho/rebar/pull/199)
+* rebar/200: [Enable runner to pass more than one argument to start](https://github.com/basho/rebar/pull/200)
+* rebar/201: [include simplemodule.app.src in simplemod template](https://github.com/basho/rebar/pull/201)
+* rebar/205: [Ports in languages other than C](https://github.com/basho/rebar/issues/205)
+* rebar/210: [use file:script if a .config.script file present](https://github.com/basho/rebar/pull/210)
+* rebar/212: [    Modified simplenode.runner to start from alternative directory](https://github.com/basho/rebar/pull/212)
+* rebar/214: [Foreground running doesn't allow console attaching](https://github.com/basho/rebar/issues/214)
+* rebar/215: [Add support for http proxy_friendly_github_urls](https://github.com/basho/rebar/pull/215)
+* rebar/388: [Less than useful rebar error message when error in .hrl files](https://github.com/basho/rebar/issues/388)
diff --git a/ebin/rebar.app b/ebin/rebar.app
index c2f3ef7..8e239e9 100644
--- a/ebin/rebar.app
+++ b/ebin/rebar.app
@@ -3,7 +3,7 @@
 {application, rebar,
  [{description, "Rebar: Erlang Build Tool"},
-  {vsn, "2.1.0"},
+  {vsn, "2.2.0"},
   {modules, [ rebar,