message: update readme about boost version
  Summary: Ubuntu 14.04's boost is out of date
diff: @@ -26,7 +26,7 @@ brew install autoconf automake libtool python3
  brew install boost jsoncpp
  ```
  -### Ubuntu 14.04 LTS (64-bit)
  +### Ubuntu (64-bit)
  ```
  sudo apt-get install \
  g++ \
  @@ -34,7 +34,6 @@ sudo apt-get install \
  autoconf \
  autoconf-archive \
  libtool \
  - libboost-all-dev \
  liblz4-dev \
  liblzma-dev \
  make \
  @@ -45,6 +44,17 @@ sudo apt-get install \
  libjsoncpp-dev
  ```
  +Redex requires boost version >= 1.58. The versions in the Ubuntu 14.04 and
  +14.10 repositories are too old. This script will install boost for you instead:
  +```
  +sudo ./get_boost.sh
  +```
  +
  +If you're on ubuntu 16.04 or newer, the version in the repository is fine:
  +```
  +sudo apt-get install libboost-all-dev
  +```
  +
  ### Experimental: Windows 10 (64-bit)
  You need Visual Studio 2017. Visual Studio 2015 is also possible, but a couple of C++ compile errors need to be fixed. We use [vcpkg](https://github.com/Microsoft/vcpkg) for dependencies. Install vcpkg from their [document](https://github.com/Microsoft/vcpkg):
  