diff --git a/docs/install.md b/docs/install.md
index 7d2f877..03b0203 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -1,11 +1,14 @@
 # How to install Toxygen
 
+## Use precompiled binary:
+[Check our releases page](https://github.com/xveduk/toxygen/releases)
+
 ## From source code (recommended for developers)
 
 ### Windows
 
 1. [Download and install latest Python 2.7](https://www.python.org/downloads/windows/)
-2. [Install PySide](https://pypi.python.org/pypi/PySide/1.2.4) *(PyQt4 support will be added later)*
+2. [Install PySide](https://pypi.python.org/pypi/PySide/1.2.4) (recommended) or [PyQt4](https://riverbankcomputing.com/software/pyqt/download)
 3. Install PyAudio: ``python -m pip install pyaudio``
 4. [Download toxygen](https://github.com/xveduk/toxygen/archive/master.zip)
 5. Unpack archive  
@@ -23,22 +26,23 @@
 
 ### Linux
 
-- Install Python2.7: 
+Dependencies:
+
+1. Install Python2.7: 
 ``sudo apt-get install python2.7``
-- [Install PySide](https://wiki.qt.io/PySide_Binaries_Linux) *(PyQt4 support will be added later)*
-- Install PyAudio: 
+2. [Install PySide](https://wiki.qt.io/PySide_Binaries_Linux)  (recommended) or [PyQt4](https://riverbankcomputing.com/software/pyqt/download)
+3. Install [toxcore](https://github.com/irungentoo/toxcore/blob/master/INSTALL.md) with toxav support in your system (install in /usr/lib/)
+4. Install PyAudio: 
 ```bash
 sudo apt-get install portaudio19-dev
 sudo pip install pyaudio
 ```
-- [Download toxygen](https://github.com/xveduk/toxygen/archive/master.zip)
-- Unpack archive 
-- Install [toxcore](https://github.com/irungentoo/toxcore/blob/master/INSTALL.md) in your system (install in /usr/lib/)
-- Run app:
-``python main.py``
+Toxygen:
 
-## Use precompiled binary:
-[Check our releases page](https://github.com/xveduk/toxygen/releases)
+1. [Download toxygen](https://github.com/xveduk/toxygen/archive/master.zip)
+2. Unpack archive 
+3. Run app:
+``python main.py``
 
 ## Compile Toxygen
 Check [compile.md](/docs/compile.md) for more info
diff --git a/src/plugin_support.py b/src/plugin_support.py
index f4618f8..fe515da 100644
--- a/src/plugin_support.py
+++ b/src/plugin_support.py
@@ -76,6 +76,9 @@ class PluginLoader(util.Singleton):
             self._plugins[name][0].lossy_packet(''.join(chr(x) for x in data[l + 1:length]), friend_number)
 
     def friend_online(self, friend_number):
+        """
+        Friend with specified number is online
+        """
         for elem in self._plugins.values():
             if elem[1]:
                 elem[0].friend_connected(friend_number)
diff --git a/src/profile.py b/src/profile.py
index a0cb3b7..a5458d4 100644
--- a/src/profile.py
+++ b/src/profile.py
@@ -484,6 +484,10 @@ class Profile(Contact, Singleton):
             self.set_active(self._active_friend)
 
     def friend_exit(self, friend_number):
+        """
+        Friend with specified number quit
+        """
+        # TODO: pause transfers
         self.get_friend_by_number(friend_number).status = None
         self.friend_typing(friend_number, False)
         if friend_number in self._call:
@@ -600,6 +604,9 @@ class Profile(Contact, Singleton):
             del self._history
 
     def clear_history(self, num=None):
+        """
+        Clear chat history
+        """
         if num is not None:
             friend = self._friends[num]
             friend.clear_corr()
@@ -696,6 +703,9 @@ class Profile(Contact, Singleton):
     # -----------------------------------------------------------------------------------------------------------------
 
     def set_alias(self, num):
+        """
+        Set new alias for friend
+        """
         friend = self._friends[num]
         name = friend.name.encode('utf-8')
         dialog = QtGui.QApplication.translate('MainWindow',
@@ -762,6 +772,9 @@ class Profile(Contact, Singleton):
         ProfileHelper.get_instance().save_profile(data)
 
     def add_friend(self, tox_id):
+        """
+        Adds friend to list
+        """
         num = self._tox.friend_add_norequest(tox_id)  # num - friend number
         item = self.create_friend_item()
         try:
diff --git a/src/toxygen.pro b/src/toxygen.pro
index 5c40a3a..463c931 100644
--- a/src/toxygen.pro
+++ b/src/toxygen.pro
@@ -1,2 +1,2 @@
-SOURCES = main.py  profile.py  menu.py  list_items.py  loginscreen.py  mainscreen.py plugins/plugin_super_class.py
+SOURCES = main.py  profile.py  menu.py  list_items.py  loginscreen.py  mainscreen.py plugins/plugin_super_class.py callbacks.py widgets.py
 TRANSLATIONS = translations/en_GB.ts  translations/ru_RU.ts  translations/fr_FR.ts