Add Developing BPM Packages

Developing-BPM-Packages.md

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+Nothing here yet!
+
+Lets say you have this script called `foo_bar.py` and you want the user to type `foo` or `bar` to launch it
+
+you make this aliases.txt file like this:
+
+```
+foo: foo_bar
+bar: foo_bar
+```
+
+Then you zip both the script and `aliases.txt` into an archive that is named `foo_bar.zip`
+
+then you `bpm install foo_bar.zip`
+
+Also include an example script like list_files.py here