Drop libresapi and modules that depends on it

A copy of the repository freezed before this deletion to ease old code
  viewing is available at
  https://github.com/RetroShare/zz_archive_RetroShare_libresapi
Removed some more cruft
Temporarly disabled JSON API generation of RsWebUi methods due to
  compilation breakage when rs_webui is disabled, RsWebUi keeps working
  but cannot be restarted from JSON API

build_scripts/Windows-msys2/WindowsMSys2_InstallGuide.md

@@ -0,0 +1,74 @@
+## Compilation on Windows
+
+The preferred build method on Windows is by using MSYS2 which is a collection
+of packages providing unix-like tools to build native Windows software.
+
+Requirements: about 12 GB of free space
+
+The resulting binary is a 32-bit build of Retroshare which will also work
+fine on a 64-bit system.
+
+### MSYS2 INSTALLATION
+
+Download MSYS2 from [MSYS2](http://www.msys2.org/). Get the i686 version
+if you run a 32-bit Windows or the x86_64 if you run a 64-bit Windows.
+
+Run the installer and install MSYS2.
+
+At the end of the installation, it'll automatically open an MSYS shell terminal.
+You can also find it on the start menu as MSYS2 MSYS. This is the shell you'll 
+use to install packages with pacman and do maintenance but NOT to build
+RetroShare.
+
+First, update your MSYS2 environment to the latest version by typing:
+
+	pacman -Syu
+
+Close the terminal window.
+
+Run MSYS2 MSYS again and finish updating with:
+
+	pacman -Su
+
+Install the default programs needed to build:
+
+	pacman -S base-devel git wget p7zip gcc perl ruby python2 doxygen cmake
+
+Install the 32-bit toolchain:
+
+	pacman -S mingw-w64-i686-toolchain
+
+Install all needed dependencies:
+
+	pacman -S mingw-w64-i686-miniupnpc
+	pacman -S mingw-w64-i686-libmicrohttpd
+	pacman -S mingw-w64-i686-libxslt
+	pacman -S mingw-w64-i686-xapian-core
+	pacman -S mingw-w64-i686-sqlcipher
+	pacman -S mingw-w64-i686-qt5
+	pacman -S mingw32/mingw-w64-i686-cmake
+
+We're done installing MSYS2, close the shell terminal.
+
+### BUILDING RETROSHARE
+
+Now run the MSYS2 MinGW 32-bit shell terminal (it's in the start menu).
+We will use it to checkout Retroshare and build it:
+
+	git clone https://github.com/RetroShare/RetroShare.git
+
+Go to the RetroShare directory and configure to your liking, for example:
+	
+	cd RetroShare
+	qmake -r -Wall -spec win32-g++ "CONFIG+=debug" "CONFIG+=rs_autologin"
+
+Now we're ready to build Retroshare. Use the '-j' option with the number of
+cores you have for a faster build, for instance if you have 4 cores:
+
+	mingw32-make -j4
+
+Make sure your current Retroshare is not running. Then just run:
+
+	retroshare-gui/src/debug/retroshare.exe
+
+You'll get debug output in the terminal and a running Retroshare instance.