Provide a dockerfile

closes https://github.com/assimp/assimp/issues/1063:

Dockerfile

@@ -0,0 +1,25 @@
+FROM ubuntu:14.04
+
+RUN apt-get update && apt-get install -y \
+    git cmake build-essential software-properties-common
+
+RUN add-apt-repository ppa:ubuntu-toolchain-r/test && apt-get update && apt-get install -y gcc-4.9 g++-4.9 && \
+    cd /usr/bin && \
+    rm gcc g++ cpp && \
+    ln -s gcc-4.9 gcc && \
+    ln -s g++-4.9 g++ && \
+    ln -s cpp-4.9 cpp
+
+WORKDIR /opt
+
+# Build Assimp
+RUN git clone https://github.com/assimp/assimp.git /opt/assimp
+
+WORKDIR /opt/assimp
+
+RUN git checkout master \
+    && mkdir build && cd build && \
+    cmake \
+    -DCMAKE_BUILD_TYPE=Release \
+    .. && \
+    make && make install