Replace USB-CCID (smartcard) by USB-HID

Remove PCSC dependencies which is a bit hard (not user friendly) to install on linux and Mac

Split Ledger logic and device IO

cmake/FindHIDAPI.cmake

@@ -0,0 +1,46 @@
+# - try to find HIDAPI library
+# from http://www.signal11.us/oss/hidapi/
+#
+# Cache Variables: (probably not for direct use in your scripts)
+#  HIDAPI_INCLUDE_DIR
+#  HIDAPI_LIBRARY
+#
+# Non-cache variables you might use in your CMakeLists.txt:
+#  HIDAPI_FOUND
+#  HIDAPI_INCLUDE_DIRS
+#  HIDAPI_LIBRARIES
+#
+# Requires these CMake modules:
+#  FindPackageHandleStandardArgs (known included with CMake >=2.6.2)
+#
+# Original Author:
+# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
+# http://academic.cleardefinition.com
+# Iowa State University HCI Graduate Program/VRAC
+#
+# Copyright Iowa State University 2009-2010.
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+find_library(HIDAPI_LIBRARY
+  NAMES hidapi hidapi-libusb)
+
+find_path(HIDAPI_INCLUDE_DIR
+  NAMES hidapi.h
+  PATH_SUFFIXES
+  hidapi)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(HIDAPI
+  DEFAULT_MSG
+  HIDAPI_LIBRARY
+  HIDAPI_INCLUDE_DIR)
+
+if(HIDAPI_FOUND)
+  set(HIDAPI_LIBRARIES "${HIDAPI_LIBRARY}")
+
+  set(HIDAPI_INCLUDE_DIRS "${HIDAPI_INCLUDE_DIR}")
+endif()
+
+mark_as_advanced(HIDAPI_INCLUDE_DIR HIDAPI_LIBRARY)