Created Building for Ubuntu 14.04 (markdown)

Building-for-Ubuntu-14.04.md

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+These instructions also apply for related distributions based on this Ubuntu LTS version. We strongly recommend updating to Ubuntu 16.04 LTS instead when it's released (scheduled for late April 2016).
+
+## Step 1: Prerequisites
+
+### GCC
+
+    sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+    sudo apt-get update
+    sudo apt-get install gcc-5 g++-5
+
+### `libstdc++`
+
+    sudo apt-get install lib32stdc++6
+
+### `xorg-dev`
+
+    sudo apt-get install xorg-dev
+
+### `cmake`
+
+The following instructions install `cmake` to `~\cmake`:
+
+    wget https://cmake.org/files/v3.5/cmake-3.5.1-Linux-x86_64.sh
+    sh cmake-3.5.1-Linux-x86_64.sh --prefix=~/cmake
+
+## Step 2: Build Citra
+
+### Get Citra
+
+    git clone --recursive https://github.com/citra-emu/citra
+
+### Compile
+
+    mkdir citra/build
+    cd citra/build
+    export CXX=g++-5
+    ~/cmake/bin/cmake .. -DCMAKE_BUILD_TYPE=Release -DCITRA_FORCE_QT4=ON
+    make
+
+## Step 3: Run Citra
+
+    ./src/citra_qt/citra-qt