Move bump to project folder

Summary: Makes building a bit easier and I can have my own README in there.

Reviewed By: jknoxville

Differential Revision: D13784725

fbshipit-source-id: b694c1ce812d4e383ad44faeacd8e0094a96b432

scripts/bump/README.md

@@ -0,0 +1,43 @@
+# bump
+
+A small script for changing version numbers automatically.
+
+## Usage
+
+Requires [stack](http://haskellstack.org/) to be installed.
+
+```
+./bump.hs --help
+```
+
+Alternatively, use the pre-checked-in binaries from the superfolder
+through `bump.sh`.
+
+To bump a release version, just pass the new version number.
+
+```
+bump 1.2.3
+```
+
+To bump to a snapshot release, run with `--snapshot`:
+
+```
+bump --snapshot 1.2.4-SNAPSHOT
+```
+
+## Building
+
+To build the native binaries, run
+
+```
+stack build
+```
+
+The binary is then placed in `.stack-work/install/x86_64-osx/**/bin/bump`.
+
+To cross-compile for Linux (required for internal CI), run
+
+```
+stack docker pull
+stack build --docker
+```