Bump extras; pypng is now part of extras.

INSTALL.md

@@ -7,8 +7,7 @@ These instructions explain how to set up the tools required to build.
 Python 2.7 is required.
 
 ```bash
-sudo apt-get install make gcc bison git python python-pip
-pip install pypng
+sudo apt-get install make gcc bison git python
 
 git clone https://github.com/bentley/rgbds
 cd rgbds
@@ -32,7 +31,6 @@ In **Terminal**, run:
 
 ```bash
 xcode-select --install
-sudo easy_install pypng
 
 git clone https://github.com/bentley/rgbds
 cd rgbds
@@ -54,7 +52,7 @@ make
 
 To build on Windows, use [**Cygwin**](http://cygwin.com/install.html). Use the default settings.
 
-In the installer, select the following packages: `make` `git` `python` `python-setuptools` `gcc-core` `libsasl2-3` `ca-certificates`
+In the installer, select the following packages: `make` `git` `python` `gettext`
 
 Then get the most recent version of [**rgbds**](https://github.com/bentley/rgbds/releases/).
 Extract the archive and put `rgbasm.exe`, `rgblink.exe` and `rgbfix.exe` in `C:\cygwin\usr\local\bin`.
@@ -62,8 +60,6 @@ Extract the archive and put `rgbasm.exe`, `rgblink.exe` and `rgbfix.exe` in `C:\
 In the **Cygwin terminal**:
 
 ```bash
-lynx -source bootstrap.pypa.io/get-pip.py | python
-pip install pypng
 
 git clone --recursive https://github.com/pret/pokecrystal
 cd pokecrystal
@@ -74,3 +70,7 @@ To build **pokecrystal.gbc**:
 ```bash
 make
 ```
+
+## notes
+
+- If `gettext` no longer exists, grab `libsasl2-3` `ca-certificates`.