Change license, add Makefile, add image caching control

1 files changed, 6 insertions, 3 deletions

diff --git a/source/know/concept/quantum-gate/index.md b/source/know/concept/quantum-gate/index.md
index e8ff579..9704e53 100644
--- a/source/know/concept/quantum-gate/index.md
+++ b/source/know/concept/quantum-gate/index.md
@@ -204,7 +204,8 @@ but not always in the basis of $$\Ket{0}_1$$, $$\Ket{1}_1$$, $$\Ket{0}_2$$ and $
 With that said, the first two-qubit gate is $$\mathrm{SWAP}$$,
 which simply swaps $$\Ket{\psi_1}$$ and $$\Ket{\psi_2}$$:
 
-{% include image.html file="swap.png" width="22%" alt="SWAP gate diagram" %}
+{% include image.html file="swap.png" width="22%"
+    alt="SWAP gate diagram" %}
 
 $$\begin{aligned}
     \boxed{
@@ -231,7 +232,8 @@ $$\begin{aligned}
 Next, there is the **controlled NOT gate** $$\mathrm{CNOT}$$,
 which "flips" (applies $$X$$ to) $$\Ket{\psi_2}$$ if $$\Ket{\psi_1}$$ is true:
 
-{% include image.html file="cnot.png" width="22%" alt="CNOT gate diagram" %}
+{% include image.html file="cnot.png" width="22%"
+    alt="CNOT gate diagram" %}
 
 $$\begin{aligned}
     \boxed{
@@ -256,7 +258,8 @@ More generally, from every one-qubit gate $$U$$,
 we can define a two-qubit **controlled U gate** $$\mathrm{CU}$$,
 which applies $$U$$ to $$\Ket{\psi_2}$$ if $$\Ket{\psi_1}$$ is true:
 
-{% include image.html file="cu.png" width="22%" alt="CU gate diagram" %}
+{% include image.html file="cu.png" width="22%"
+    alt="CU gate diagram" %}
 
 $$\begin{aligned}
     \boxed{