Kicad manager: fix Bug #1385953 (unable to open .PDF files with spaces in name/path when using default PDF browser).
Fix also an issue when selecting preferred browser.

Eeschema, Plot dialog: add Plot directory selection. The patch from 1383026@bugs.launchpad.net was widely used.

eeschema: fix Bug #1385789 (eeschema segfaults, when editing a new field). Fix an other minor bug in Footprint editor.

* Add FindOpenSSL.cmake from CMake 3.0.2.
* Change MinGW find library to find libssl and libcrypto as well as libeay32 and ssleay32.  Apparently
 at some point OpenSSL changed the library file names for MinGW.
* Stop find_library() from looking in system paths and returning the actual DLLs rather than the link
  libraries.

* Use wxRenameFile which falls back to a file copy and file remove when
  wxRename fails.

* Make all files generated by make_lexer() dependencies of thier respective build targets.
* Make building Boost a dependency for all libraries.
* Remove duplicate make_lexer() call for Specctra lexer files.

python scripting: refinement for UTF8 class (from Miguel Ángel Ajo Pelayo) add __str__  method, usefull to print a UTF8 string.
Kicad manager: fix issues in file watcher: changes (adding/removing files)  in project folder not seen by Kicad manager (perhaps due to changes in internal wxWidgets code between 2.9.5 and 3.0).

* Exit script when package install, build configuration, or build fails.
* Install each dependency package one at a time.

* Write stable-release-policy.md for upcoming stable release.
* Remove unused Doxygen options from Doxyfile.

Python scripting: make UTF8 class accessible by python scripts. Add python method GetChars() to UTF8 class to get its char buffer.
See scripts/test_kicad_plugin.py for example.

* Improve VRML export dialog lay out.
* Make the OK button the default action in the export dialog.
* Make 3D model export work correctly and avoid redundant file copies.
* Fix embedded path separators in wrl files on windows.
* Fix absolute model file path creation in wrl files.
* Clean up VRML export code.

Pcbnew: fix Bug #1380943 (Filled polygons with thick outlines are missing last outline thick segment in gerber)
Remove a debug message in searchhelpfilefullpath.cpp.

* Change hot key editing contol from wxGridTableBase to wxListCtrl.
* Separate hot key lists into separate tabs rather than one large list.
* Coding policy fixes.

Archive function now recurses project sub directories.

Fix bug: Dialog "Page settings" does not always detect page format. Formats A, B, C, D, E, Custom (User) are detected right but A0-A4, US* are wrong.

Set wxNO_BORDER for the tab page.

* Many path related fixes.
* Fix execution of external applications.
* Update mac-osx.txt.
* Add top-level links for standalone applications inside OSX bundle.
* Fix document icons for Eeschema and pl_editor.
* Create individual bundles for standalone applications inside the main application bundle.
* Add usual 'site-packages' to python path in OSX bundle.
* Fix name of OSX bundle plugin folder.

Rename "Switch highcontrast" to "Toggle High Contrast".
Eliminate most of the abbreviated hotkey titles.
Doxygenize dialog_hotkeys_editor.h and add missing license block.
Display <unassigned> if key code is 0 (NULL).