Fix interval compilation error

src/esphomelib/automation.cpp

@@ -41,7 +41,7 @@ float LoopTrigger::get_setup_priority() const {
   return setup_priority::HARDWARE_LATE;
 }
 
-void IntervalTrigger::loop() {
+void IntervalTrigger::update() {
   this->trigger();
 }
 float IntervalTrigger::get_setup_priority() const {

src/esphomelib/automation.h

@@ -108,7 +108,7 @@ class LoopTrigger : public Trigger<NoArg>, public Component {
 class IntervalTrigger : public Trigger<NoArg>, public PollingComponent {
  public:
   IntervalTrigger(uint32_t update_interval);
-  void loop() override;
+  void update() override;
   float get_setup_priority() const override;
 };
 

src/esphomelib/ota_component.h

@@ -56,9 +56,7 @@ class OTAComponent : public Component {
   /** Set a plaintext password that OTA will use for authentication.
    *
    * Warning: This password will be stored in plaintext in the ROM and can be read
-   * by intruders. It is however secured somewhat secure again MITM attacks (attackers
-   * could still modify the binary while you're sending it, but they can't start OTA processes
-   * themselves.)
+   * by intruders.
    *
    * @param password The plaintext password.
    */