source tree reorganization

As the project has grown, we've let things get a bit out of their
logical place. This does a bit of cleanup and tries to bring some
of the embedded resources closer to where they are used.

But more importantly, this allows us to clean some things up to
the point that we can move forward statically linking a bunch of
the plugins into libide. The plan here is to speed up the initial
loading by avoiding lots of disk I/O stats which are currently
hurting us.

data/meson.build

@@ -43,3 +43,8 @@ configure_file(
 	install: true,
 	install_dir: join_paths(get_option('datadir'), 'dbus-1', 'services'),
 )
+
+subdir('fonts')
+subdir('gsettings')
+subdir('icons')
+subdir('style-schemes')

meson.build

@@ -262,17 +262,8 @@ gnome = import('gnome')
 i18n = import('i18n')
 
 subdir('data')
-subdir('data/fonts')
-subdir('data/gsettings')
-subdir('data/icons')
-subdir('data/style-schemes')
-subdir('contrib/libeditorconfig')
-subdir('contrib/xml')
-subdir('contrib/gstyle') # Depends on libxml
-subdir('libide')
-subdir('plugins')
+subdir('src')
 subdir('po')
-subdir('tests')
 subdir('doc')
 
 exe_link_args = [ '-pie' ]

plugins/html-preview/css/markdown.css

-/* this file came from https://raw.githubusercontent.com/sindresorhus/github-markdown-css/gh-pages/github-markdown.css */
-
-.markdown-body {
-  font-family: sans-serif;
-  -ms-text-size-adjust: 100%;
-  -webkit-text-size-adjust: 100%;
-  font: 13px Helvetica, arial, freesans, clean, sans-serif;
-  line-height: 1.4;
-  color: #333333;
-  font-size: 15px;
-  line-height: 1.7;
-  overflow: hidden;
-  word-wrap: break-word;
-}
-
-.markdown-body a {
-  background: transparent;
-}
-
-.markdown-body a:active,
-.markdown-body a:hover {
-  outline: 0;
-}
-
-.markdown-body strong {
-  font-weight: bold;
-}
-
-.markdown-body h1 {
-  font-size: 2em;
-  margin: 0.67em 0;
-}
-
-.markdown-body img {
-  border: 0;
-}
-
-.markdown-body hr {
-  -moz-box-sizing: content-box;
-  box-sizing: content-box;
-  height: 0;
-}
-
-.markdown-body pre {
-  overflow: auto;
-}
-
-.markdown-body code,
-.markdown-body pre {
-  font-family: monospace, monospace;
-  font-size: 1em;
-}
-
-.markdown-body table {
-  border-collapse: collapse;
-  border-spacing: 0;
-}
-
-.markdown-body td,
-.markdown-body th {
-  padding: 0;
-}
-
-.markdown-body * {
-  -moz-box-sizing: border-box;
-  box-sizing: border-box;
-}
-
-.markdown-body a {
-  color: #4183c4;
-  text-decoration: none;
-}
-
-.markdown-body a:hover {
-  text-decoration: underline;
-}
-
-.markdown-body a:focus,
-.markdown-body a:active {
-  text-decoration: underline;
-}
-
-.markdown-body hr {
-  height: 0;
-  margin: 15px 0;
-  overflow: hidden;
-  background: transparent;
-  border: 0;
-  border-bottom: 1px solid #ddd;
-}
-
-.markdown-body hr:before,
-.markdown-body hr:after {
-  content: " ";
-  display: table;
-}
-
-.markdown-body hr:after {
-  clear: both;
-}
-
-.markdown-body ol ol {
-  list-style-type: lower-roman;
-}
-
-.markdown-body h1,
-.markdown-body h2,
-.markdown-body h3,
-.markdown-body h4,
-.markdown-body h5,
-.markdown-body h6 {
-  margin-top: 15px;
-  margin-bottom: 15px;
-  line-height: 1.1;
-}
-
-.markdown-body h1 {
-  font-size: 30px;
-}
-
-.markdown-body h2 {
-  font-size: 21px;
-}
-
-.markdown-body h3 {
-  font-size: 16px;
-}
-
-.markdown-body h4 {
-  font-size: 14px;
-}
-
-.markdown-body h5 {
-  font-size: 12px;
-}
-
-.markdown-body h6 {
-  font-size: 11px;
-}
-
-.markdown-body blockquote {
-  margin: 0;
-}
-
-.markdown-body ul,
-.markdown-body ol {
-  padding: 0;