update README and sample images

README.md

@@ -92,6 +92,11 @@ The current avaliable styles are:
   * `v-paragraph-low` : Lower paragraph symbol `¶`
 
 ## Release Notes
+
+* **1.8.0**
+  * ​	Added a lower paragraph symbol (`¶`) shape, and two OpenType features (`cv22` and `cv23`) to enable them.
+  * Most mathematical operators, like `≤`, will be full-width in the CC variants.
+  * Added experimental ligatures support. Currently the ligatures are assigned to feature “`calt`” and contains these feagures only: `-> --> <- <-- <-> <!--` . Note that Iosevka does not contain "real" ligature glyphs, these figures are implemented using chained substitution and long dashes. 
 * **1.7.5**
   - Reduced the weight of Bold, and increased the size of periods of Medium.
 * **1.7.4**
@@ -176,4 +181,4 @@ The current avaliable styles are:
   - The digaphs defined in Unicode is now single-width.
   - Reorganized subfamilies: Now the default Iosevka does not contain full-width glyphs any more.
 
-![Family Matrix](https://raw.githubusercontent.com/be5invis/Iosevka/master/images/matrix.png)
+![Family Matrix](https://raw.githubusercontent.com/be5invis/Iosevka/master/images/matrix.png)

snapshot/index.html

@@ -296,6 +296,11 @@ section#opentype span.rhs.sub b {
 			<span class="arrow icon-arrow-right-circle"></span>
 			<span class="feature-example"><span class="lhs">cv20</span><span class="rhs sub" style="-webkit-font-feature-settings:'cv20'; font-feature-settings:'cv20'">shared<b>_</b>ptr<br><i>shared<b>_</b>ptr</i></span></span><span class="feature-example"><span class="lhs">cv21</span><span class="rhs sub" style="-webkit-font-feature-settings:'cv21'; font-feature-settings:'cv21'">shared<b>_</b>ptr<br><i>shared<b>_</b>ptr</i></span></span>
 	</div>
+	<div>
+			<span class="normal-example"><span class="lhs">default</span><span class="rhs sub">ref:<b>¶</b>1.1<br><i>ref:<b>¶</b>1.1</i></span></span>
+			<span class="arrow icon-arrow-right-circle"></span>
+			<span class="feature-example"><span class="lhs">cv22</span><span class="rhs sub" style="-webkit-font-feature-settings:'cv22'; font-feature-settings:'cv22'">ref:<b>¶</b>1.1<br><i>ref:<b>¶</b>1.1</i></span></span><span class="feature-example"><span class="lhs">cv23</span><span class="rhs sub" style="-webkit-font-feature-settings:'cv23'; font-feature-settings:'cv23'">ref:<b>¶</b>1.1<br><i>ref:<b>¶</b>1.1</i></span></span>
+	</div>
 </section>
 <section id="matrix">
 	<div>