Some doc fix

butterfly/bin/btheme

@@ -8,7 +8,7 @@ except ImportError:
     from urllib import urlopen
 
 from io import BytesIO
-from shutil import move
+from shutil import move, rmtree
 from zipfile import ZipFile
 from tempfile import mkdtemp
 from butterfly.escapes import sass
@@ -62,12 +62,21 @@ if args.install:
 
     zip_dest = os.path.join(home_dir, 'butterfly-themes-master')
     theme_dir = os.path.join(home_dir, 'themes')
-    if os.path.exists(theme_dir):
+    if not os.path.exists(theme_dir):
+        os.makedirs(theme_dir)
+
     tmp_dir = mkdtemp()
-        print('%s already present. Putting it in %s.' % (
-            theme_dir, os.path.join(tmp_dir, 'themes')))
-        move(theme_dir, tmp_dir)
-    move(zip_dest, theme_dir)
+    for dir_ in os.listdir(zip_dest):
+        if dir_ == 'README.md':
+            continue
+        new_dir = os.path.join(theme_dir, dir_)
+        if os.path.exists(new_dir):
+            move(new_dir, tmp_dir)
+            print('Old theme %s has been backed up in %s' % (
+                new_dir, tmp_dir))
+        move(os.path.join(zip_dest, dir_), theme_dir)
+
+    rmtree(zip_dest)
     print('%s extracted.' % theme_dir)
 
 elif args.refresh:

butterfly/bin/butterfly_help

@@ -25,7 +25,7 @@ Butterfly is a xterm compliant terminal built with python and javascript.
 {title}Butterfly programs:{reset}
   {strong}bcat     : {reset}A wrapper around cat allowing to display images as <img> instead of binary.
   {strong}bopen    : {reset}Open a new terminal at specified location.
-  {strong}bopen  : {reset}Open or rattach a butterfly session. Multiplexing is supported.
+  {strong}bsession : {reset}Open or rattach a butterfly session. Multiplexing is supported.
   {strong}b16M     : {reset}Test the 16M colors support in terminal.
   {strong}bhr      : {reset}Put a html hr. This is a test for html output.
   {strong}bcal     : {reset}Display current month using html. This is also a test for html output.
@@ -36,25 +36,27 @@ Butterfly is a xterm compliant terminal built with python and javascript.
   To style butterfly in sass, you need to have the libsass python library installed.
 
   First check out existing themes, run:
-    $ btheme --install
+    {code}$ btheme --install{reset}
   Then try:
-    $ btheme solarized-dark # or C64 or abstract-image
-  If you want to set a theme as default add a 'style=theme' line in your butterfly.conf
+    {code}$ btheme solarized-dark {comment}# or C64 or abstract-image{reset}
+  If you want to set a theme as default add a 'theme="theme"' line in your butterfly.conf
 
   If you want to style it yourself do:
-    $ cp {main} ~/.butterfly/style.sass # or /etc/butterfly/style.sass for system wide
+    {code}$ cp {main} ~/.butterfly/style.sass {comment}# or /etc/butterfly/style.sass for system wide{reset}
   and then edit this file.
 
   You can also copy the imported sass files in the same dir. Run:
-    $ btheme --refresh
+    {code}$ btheme --refresh{reset}
   To update the style in the current terminal.
 
-  Finally when your theme is done please submit it to https://github.com/paradoxxxzero/butterfly-themes
+  Finally you can make a theme in the themes directory and submit it to https://github.com/paradoxxxzero/butterfly-themes
 
   It is also possible to use a style.css file and re do all the styling in css exclusively.\
 """.format(
     title=ansi_colors.light_blue,
     strong=ansi_colors.white,
+    code=ansi_colors.light_yellow,
+    comment=ansi_colors.light_magenta,
     reset=ansi_colors.reset,
     main=os.path.normpath(os.path.join(
                 os.path.abspath(os.path.dirname(__file__)),