adds build system

using cmake for intermediate build system. resolves issue #2
- also moves the CLI tool to a separate directory

.gitignore

@@ -27,3 +27,6 @@
 *.exe
 *.out
 *.app
+
+# build products
+build

CMakeLists.txt

@@ -0,0 +1,38 @@
+cmake_minimum_required (VERSION 3.5)
+SET (EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)
+SET (LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)
+
+project (EPANET)
+SET (CMAKE_C_FLAGS "-std=c99")
+SET (CMAKE_CXX_FLAGS "-Wall -std=c++11")
+
+SET (epanet_lib_sources src/Elements/junction.cpp
+src/Input/patternparser.cpp
+src/Core/datamanager.cpp	src/Elements/link.cpp		src/Models/demandmodel.cpp
+src/Core/diagnostics.cpp	src/Elements/node.cpp		src/Models/headlossmodel.cpp
+src/Core/epanet3.cpp		src/Elements/pattern.cpp	src/Models/leakagemodel.cpp
+src/Core/error.cpp		src/Elements/pipe.cpp		src/Models/pumpenergy.cpp
+src/Core/hydbalance.cpp		src/Elements/pump.cpp		src/Models/qualmodel.cpp
+src/Core/hydengine.cpp		src/Elements/pumpcurve.cpp	src/Models/tankmixmodel.cpp
+src/Core/network.cpp		src/Elements/qualsource.cpp	src/Output/outputfile.cpp
+src/Core/options.cpp		src/Elements/reservoir.cpp	src/Output/projectwriter.cpp
+src/Core/project.cpp		src/Elements/tank.cpp		src/Output/reportfields.cpp
+src/Core/qualbalance.cpp	src/Elements/valve.cpp		src/Output/reportwriter.cpp
+src/Core/qualengine.cpp		src/Input/controlparser.cpp	src/Utilities/graph.cpp
+src/Core/units.cpp		src/Input/curveparser.cpp	src/Utilities/hashtable.cpp
+src/Elements/control.cpp	src/Input/inputparser.cpp	src/Utilities/mempool.cpp
+src/Elements/curve.cpp		src/Input/inputreader.cpp	src/Utilities/segpool.cpp
+src/Elements/demand.cpp		src/Input/linkparser.cpp	src/Utilities/utilities.cpp
+src/Elements/element.cpp	src/Input/nodeparser.cpp
+src/Elements/emitter.cpp	src/Input/optionparser.cpp
+src/Solvers/ggasolver.cpp	src/Solvers/ltdsolver.cpp	src/Solvers/qualsolver.cpp	src/Solvers/sparspaksolver.cpp
+src/Solvers/hydsolver.cpp	src/Solvers/matrixsolver.cpp	src/Solvers/sparspak.cpp
+
+)
+
+include_directories(src src/Core src/Elements src/Input src/Output src/Utilities src/Solvers)
+
+add_library(epanet3 SHARED ${epanet_lib_sources})
+
+add_executable(run-epanet3 src/CLI/main.cpp)
+target_link_libraries(run-epanet3 LINK_PUBLIC epanet3)