Again an update of autotools related files.

Again an update of autotools related files.

- restored and updated INSTALL that was accidentally overwritten with r1731 (Sorry!)
- restored cvaliases.i that was accidentally overwritten with r1731 (Sorry!)
- fixed automake rule to update cvaliases_autogen.i instead of cvaliases.i as necessary since r1544
- added dependency to zlib necessary with the new cxpersistence.cpp from r1982
- added a couple of new files to EXTRA_DIST rules
- added unittest framework to 'make check' target
- added environment variable TESTDATA_DIR that allows 'make distcheck' to find testdata in an external directory
- fixed swig support scripts so that now all macros in cxtypes.h work again
- fixed Makefile.am for octave wrapper
- updated swig generated files with swig 1.3.39
- updated libtool support files from 1.x to 2.x
- added method for cvCreateTrackbar2 to window.cpp
- added libdc1394_v2 support
- added support for ffmpeg headers at new places (libavformat/avformat.h compared to ffmpeg/avformat.h)
- fixed some automake targets to let 'make distcheck' complete without errors regarding
  distribution completeness test (make uninstall-check, etc.)

git-svn-id: https://code.ros.org/svn/opencv/trunk@1983 73c94f0f-984f-4a5f-82bc-2d8db8d8ee08