Update README and requirements

README.md

@@ -23,6 +23,14 @@ echo "source $PWD/pwndbg/gdbinit.py" >> ~/.gdbinit
 
 ### Prerequisites
 
+#### Python Development Headers
+
+These will be needed to build other Python modules below.
+
+```sh
+sudo apt-get install python-dev python3-dev python-pip python3-pip 
+```
+
 #### Capstone 4.0
 
 Currently this is only available via a source build.
@@ -55,8 +63,6 @@ sudo python3 setup.py install # Ubuntu 14.04+, GDB uses Python3
 
 There are some other Python requirements which are easier to install.
 
-This step will also verify that you have installed Capstone and Unicorn correctly.
-
 ```sh
 pip install -Ur requirements.txt
 ```

requirements.txt

@@ -1,5 +1,4 @@
+pip
 pycparser
 psutil>=3.1.0
 python-ptrace>=0.8
-capstone>=4.0
-unicorn>=0.9