Remove large HAL headers from wpilibc headers (#1386)

Now only includes the types in the wpilib headers.
Should immensely clean up intellisense.

Closes #1383

wpilibc/src/main/native/cpp/CAN.cpp

@@ -9,7 +9,11 @@
 
 #include <utility>
 
-#include <hal/HAL.h>
+#include <hal/CAN.h>
+#include <hal/CANAPI.h>
+#include <hal/Errors.h>
+#include <hal/FRCUsageReporting.h>
+#include <hal/HALBase.h>
 
 using namespace frc;
 

wpilibc/src/main/native/cpp/Encoder.cpp

@@ -9,7 +9,9 @@
 
 #include <utility>
 
-#include <hal/HAL.h>
+#include <hal/Encoder.h>
+#include <hal/FRCUsageReporting.h>
+#include <hal/HALBase.h>
 
 #include "frc/DigitalInput.h"
 #include "frc/WPIErrors.h"

wpilibc/src/main/native/cpp/RobotBase.cpp

@@ -23,6 +23,17 @@
 
 using namespace frc;
 
+int frc::RunHALInitialization() {
+  if (!HAL_Initialize(500, 0)) {
+    wpi::errs() << "FATAL ERROR: HAL could not be initialized\n";
+    return -1;
+  }
+  HAL_Report(HALUsageReporting::kResourceType_Language,
+             HALUsageReporting::kLanguage_CPlusPlus);
+  wpi::outs() << "\n********** Robot program starting **********\n";
+  return 0;
+}
+
 std::thread::id RobotBase::m_threadId;
 
 namespace {

wpilibc/src/main/native/cpp/SampleRobot.cpp

@@ -7,6 +7,9 @@
 
 #include "frc/SampleRobot.h"
 
+#include <hal/DriverStation.h>
+#include <hal/FRCUsageReporting.h>
+#include <hal/HALBase.h>
 #include <networktables/NetworkTable.h>
 #include <wpi/raw_ostream.h>