Merge pull request #34 from dozeo/develop

Changed wget to curl when downloading yasm
Wget is downloaded now, it used for Windows buildserver to support download of files with https protocol.
Merge branch 'master' into fix/win32_build
Merge pull request #35 from dozeo/fix/win32_build

Wget is downloaded on Windows to support https downloads
On Windows the `unzip` command line tool is downloaded in build script.

* build script downloads the `unzip` command line tool on Windows
* on one of the Windows build machines the tool did not extract a zip file
Merge pull request #36 from dozeo/fix/win32_build

On Windows the `unzip` command line tool is downloaded in build script.
The dependency build script on OSX builds PolarSSL from submodule
Protocols `rtmpte` & `rtmpts` are activated in the dependencies scripts for all platforms.

* streaming support for protocols `rtmpte` & `rtmpts` are included in build scripts
* dependencies must be rebuild to include changes
Merge branch 'master' into feature/rtmpte
Merge pull request #37 from dozeo/feature/rtmpte

Protocol rtmpte enabled in ffmpeg library
Added keyframe property to VideoSenderOptions
In the resulting video stream the keyframe property can be set through the `VideoSender`

* keyframe value is given as argument to VideoSender classes and used in VideoStream setup
* motion estimation method is for now deactivated
Merge pull request #38 from dozeo/feature/keyframe_param

Keyframe can be set in the VideoStream
Fixed keyframe argument on setting video options
Merge pull request #39 from dozeo/feature/keyframe_param

Fixed keyframe argument on setting video options
Build clean up, a destination folder for grabsend program can be set

* fixes linking of boost directories
* an installation directory can be set for the `grabsend` program, defaults to `bin`
Merge pull request #40 from dozeo/fix/install_grabsend_dir

Build clean up, a destination folder for grabsend program can be set
Registering signal handler for system signals is done earlier

Before grabber / videosender is opened first the signal handlers are registered. This allows
better error handling if the VideoSender hangs, which can happen if the URL is not
accessible.
Merge pull request #41 from dozeo/fix_signal_handler

Registering signal handler for system signals is done earlier
Fixes link and extraction of pkg-config-lite