add comments for style blocks in less

separates each component into individual line in compiled css,
reducing some churn in minified css files.

IPython/html/static/auth/less/style.less

@@ -1,2 +1,7 @@
+/*!
+*
+* IPython auth
+*
+*/
 @import "login.less";
 @import "logout.less";

IPython/html/static/base/less/style.less

@@ -1,3 +1,8 @@
+/*!
+*
+* IPython base
+*
+*/
 @import "variables.less";
 @import "mixins.less";
 @import "flexbox.less";

IPython/html/static/notebook/less/style.less

@@ -1,5 +1,10 @@
 @import "style_noapp.less";
 
+/*!
+*
+* IPython notebook webapp
+*
+*/
 @import "notebook.less";
 @import "celltoolbar.less";
 @import "completer.less";

IPython/html/static/notebook/less/style_noapp.less

@@ -1,3 +1,8 @@
+/*!
+*
+* IPython notebook
+*
+*/
 @import "variables.less";
 @import "ansicolors.less";
 @import "cell.less";

IPython/html/static/style/style.less

@@ -1,8 +1,16 @@
-// Bootstrap
+/*!
+*
+* Twitter Bootstrap
+*
+*/
 @import "../components/bootstrap/less/bootstrap.less";
 @import "../components/bootstrap/less/responsive-utilities.less";
 
-// Font-Awesome
+/*!
+*
+* Font Awesome
+*
+*/
 @import "../components/font-awesome/less/font-awesome.less";
 @FontAwesomePath:    "../components/font-awesome/font";
 

IPython/html/static/tree/less/style.less

@@ -1,2 +1,7 @@
+/*!
+*
+* IPython tree view
+*
+*/
 @import "altuploadform.less";
 @import "tree.less";