diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..496ee2c
--- /dev/null
+++ b/.gitignore
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diff --git a/assets/gui/chp.svg b/assets/gui/chp.svg
new file mode 100644
index 0000000..636d401
--- /dev/null
+++ b/assets/gui/chp.svg
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diff --git a/assets/gui/demand_general.svg b/assets/gui/demand_general.svg
new file mode 100644
index 0000000..b786d6c
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