feat(css): Global update of the site theme

Signed-off-by: Valentin Popov <info@valentineus.link>

.gitmodules

@@ -1,8 +0,0 @@
-[submodule "bootstrap"]
-	path = _scss/bootstrap
-	url = https://github.com/twbs/bootstrap-sass.git
-	branch = 3.3-stable
-[submodule "bootswatch"]
-	path = _scss/bootswatch
-	url = https://github.com/thomaspark/bootswatch.git
-	branch = master

_scss/base/_bootstrap.scss

@@ -1,3 +0,0 @@
-@import 'bootswatch/cosmo/_variables.scss';
-@import 'bootstrap/assets/stylesheets/bootstrap';
-@import 'bootswatch/cosmo/_bootswatch.scss';

_scss/base/_main.scss

@@ -1,3 +1 @@
 @import 'components/core';
-@import 'components/github';
-@import 'components/image';

_scss/base/_normalize.scss

@@ -0,0 +1 @@
+@import 'normalize/main';

_scss/base/_sakura.scss

@@ -6,3 +6,5 @@ $color-text: #4a4a4a;
 $font-family-sans-serif: Verdana, Geneva, sans-serif;
 $font-family-serif: serif;
 $font-size-base: 1.8rem;
+
+@import 'sakura/main';

_scss/components/_github.scss

@@ -1,4 +0,0 @@
-.github-avatar {
-    max-height: 16px;
-    max-width: 16px;
-}

_scss/components/_image.scss

@@ -1,4 +0,0 @@
-img {
-  max-width: 100%;
-  width: auto;
-}

assets/css/styles.scss

@@ -1,7 +1,8 @@
 ---
-# Loading site styles.
+# Loading site styles
 ---
 
-@import 'base/bootstrap';
+@import 'base/normalize';
 @import 'base/highlight';
+@import 'base/sakura';
 @import 'base/main';