Fix git-flow issues with shFlags

I changed the install process to pull the gitflow repo recursively
before running the installer rather than let the installer do it,
because for some reason the installer thinks that the shFlags
submodule is there (when it isn't).

Going by the msysgit-install.cmd I copy the shflags file over the
gitflow-shFlags file which ultimately fixes the bug causing
git-flow not to work on a fresh install.

I also refactored the post_install script so that all the cmd calls
are in the same Invoke-Expression call
Merge pull request #38 from deevus/git-flow

Fix git-flow issues with shFlags
Update atom to 0.141.0
Merge pull request #39 from scottwillmoore/update-atom

Update atom to 0.141.0
Add OneGet

Windows 10 will include a package manager OneGet, here is a Scoop
manifest to get the latest "nightly"
* This most likely will need some tweaks as the PowerShell module
version changes I'm not sure if `Import-Module` will actually update the
module.
* Some resources about OneGet if your curious [Hacker
News](https://news.ycombinator.com/item?id=8524919) [Twitter
@PSOneGet](https://twitter.com/PSOneGet)
* As OneGet is fully extensible a plugin could be written to include
Scoop as a "Package Provider"
Merge pull request #41 from ntwb/master

Add OneGet
Add gvim package
Merge pull request #42 from deevus/gvim

Add gvim package
ngrok 1.7
Update ngrok.json
Merge pull request #43 from myty/patch-1

Patch 1
Create strings.json
Merge pull request #44 from shipcod3/master

Create strings.json
Create nircmd.json

nircmd- a console program that allows you to write and delete values and keys in the Registry, write values into INI file, dial to your internet account or connect to a VPN network, restart windows or shut down the computer, create shortcut to a file, change the created/modified date of a file, change your display settings, turn off your monitor, open the door of your CD-ROM drive, and more..
Merge pull request #45 from shipcod3/master

Create nircmd.json
Fix nircmd issues
Update nircmd.json

ignoring the hash
Update strings.json

ignoring the hash
Merge pull request #46 from shipcod3/master

ignoring the hashes
Merge pull request #47 from scottwillmoore/fix-nircmd

Fix nircmd issues