Replace Python csv_to_snapshot with C++

Summary:
Setup scaffolding for building Memgraph tools.

Change `utils::Split` without delimiter to split on whitespace.
This should make `Split` behave just like Python's `str.split`, which is
more practical for splitting on word boundaries.

Add `utils::StartsWith` function.

Rewrite csv_to_snapshot to C++.

Reviewers: mferencevic

Reviewed By: mferencevic

Subscribers: pullbot

Differential Revision: https://phabricator.memgraph.io/D822

tools/setup

@@ -0,0 +1,16 @@
+#!/bin/bash -e
+
+# Builds the memgraph tools and installs them in this directory.
+
+script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+mkdir -p ${script_dir}/build
+cd ${script_dir}/build
+
+# Setup cmake
+cmake -DCMAKE_BUILD_TYPE=Release \
+      -DCMAKE_INSTALL_PREFIX=${script_dir} \
+      ${script_dir}
+
+# Install the tools
+make -j$(nproc) install