fix : some user cannot use certain Freeseer tools that make use of setplaceholdertext(). Because their version of PyQt4 is too old.
 if hasattr(QtGui.QLineEdit(), 'setPlaceholderText'):
Merge pull request #296 from hosi-mo/fix/pyqt4.7.3_2

fix: Check for existence of setPlaceholderText was checking for exact version

- Fixed the check for Qt method setPlaceholderText() was checking if 
  the user had exactly python version 4.7.3, instead we are now
  checking the property exists.
Merge branch 'experimental' of https://github.com/Freeseer/freeseer into pulse-source-select
Optimize how PluginManager loads it's decorators

- Set a change trigger to auto-save when config change is detected.
Remove unnecessary modules
Should use docstrings when possible
Support both interactive and shell modes
Closes GH-236 Create base Freeseer GUI App class to maximize code reuse

A FreeseerApp() base class has been created which handles languages
and the menu bar in Freeseer applications.

The following tools have been modified to use a common base class:

    - ConfigTool
    - RecordTool
    - TalkEditor
    - ReportEditor
    - FreeseerServer
GH-298 French Translation completeness
Update translations files with new strings
Update language translations and resource files
Closes GH-300 Translations don't seem to load for the Controller Client
Add classifiers to setup.py

- Also set the author to "Free and Open Source Software Learning Center"
Fix tabs
Remove unnecessary code
Closes GH-305 Merge Linux and Windows recording plugins

- Merged the Windows desktop plugin into the Linux one
- The new plugin is simply named Desktop Source
GH-209 Create plugins for Windows for recording from USB/Webcam

- Uses dshowvideosrc to record on Windows.
Closes GH-209 USB plugin auto-detect devices

- Devices are now auto-detected using GstPropertyProbe on both linux and
  Windows Systems.
GH-209 Probe for device on linux

- Seems probing for device-name on Linux does not work as expected
Add "credits" and "license" to CLI intro message