Correct version regex in Makefile, add git as dependency

Makefile

@@ -1,7 +1,7 @@
 #! /usr/bin/make
 
 # Extract version from git, or if we're from a zipfile, use dirname
-VERSION=$(shell git describe --always --dirty=-modded --abbrev=7 2>/dev/null || pwd | sed -n 's,.*/clightning-\(v[0-9.rc]*\)$$,\1,p')
+VERSION=$(shell git describe --always --dirty=-modded --abbrev=7 2>/dev/null || pwd | sed -n 's,.*/lightning-\([0-9.rc]*\)$$,\1,p')
 
 ifeq ($(VERSION),)
 $(error "ERROR: git is required for generating version information")

README.md

@@ -60,7 +60,7 @@ For the impatient here's the gist of it for Ubuntu and Debian:
     sudo apt-get install -y \
       autoconf automake build-essential git libtool libgmp-dev \
       libsqlite3-dev python python3 net-tools zlib1g-dev libsodium-dev \
-      python3-mako
+      python3-mako git
     git clone https://github.com/ElementsProject/lightning.git
     cd lightning
     ./configure

doc/INSTALL.md

@@ -38,7 +38,8 @@ Get dependencies:
     sudo apt-get update
     sudo apt-get install -y \
       autoconf automake build-essential git libtool libgmp-dev \
-      libsqlite3-dev python python3 python3-mako net-tools zlib1g-dev libsodium-dev
+      libsqlite3-dev python python3 python3-mako net-tools zlib1g-dev libsodium-dev \
+      git
 
 If you don't have Bitcoin installed locally you'll need to install that
 as well:
@@ -85,6 +86,7 @@ $ sudo dnf update -y && \
         sudo dnf install -y \
                 asciidoc \
                 clang \
+                git \
                 gmp-devel \
                 libsq3-devel \
                 python2-devel \