Update SDK to 2.0.0

- Update SDK header files and libraries to SDK 2.0.0 plus 2.0.0_16_08_09
  patch
- Remove mem_manager.o from libmain.a (replaced with umm_malloc)
- Disable switch from DIO to QIO mode for certain flash chips (saves
  IRAM space)
- Add user_rf_cal_sector_set; it points to rf_init_data sector.
- Change the way rf_init_data is spoofed.
  This is now done by wrapping spi_flash_read and returning the data we
  need during startup sequence.
- Place lwip library into flash using linker script instead of section
  attributes (saves IRAM space)

tools/sdk/include/simple_pair.h

@@ -0,0 +1,45 @@
+/*
+ *  Copyright (C) 2015 -2018  Espressif System
+ *
+ */
+
+#ifndef __SIMPLE_PAIR_H__
+#define __SIMPLE_PAIR_H__
+
+typedef enum {
+	SP_ST_STA_FINISH = 0,
+	SP_ST_AP_FINISH = 0,
+	SP_ST_AP_RECV_NEG,
+	SP_ST_STA_AP_REFUSE_NEG,
+	/* all following is err */
+	SP_ST_WAIT_TIMEOUT,
+	SP_ST_SEND_ERROR,
+	SP_ST_KEY_INSTALL_ERR,
+	SP_ST_KEY_OVERLAP_ERR,  //means the same macaddr has two different keys 
+	SP_ST_OP_ERROR,
+	SP_ST_UNKNOWN_ERROR,
+	SP_ST_MAX,
+} SP_ST_t;
+
+
+typedef void (*simple_pair_status_cb_t)(u8 *sa, u8 status);
+
+int register_simple_pair_status_cb(simple_pair_status_cb_t cb);
+void unregister_simple_pair_status_cb(void);
+
+int simple_pair_init(void);
+void simple_pair_deinit(void);
+
+int simple_pair_state_reset(void);
+int simple_pair_ap_enter_announce_mode(void);
+int simple_pair_sta_enter_scan_mode(void);
+
+int simple_pair_sta_start_negotiate(void);
+int simple_pair_ap_start_negotiate(void);
+int simple_pair_ap_refuse_negotiate(void);
+
+int simple_pair_set_peer_ref(u8 *peer_mac, u8 *tmp_key, u8 *ex_key);
+int simple_pair_get_peer_ref(u8 *peer_mac, u8 *tmp_key, u8 *ex_key);
+
+
+#endif /* __SIMPLE_PAIR_H__ */