Update docs and fix bugs (#149)

Improved the docs for the 3 main Tactility projects. I also fixed some inaccuracies and bugs in certain APIs as I went through the code.

Tactility/Source/service/screenshot/Screenshot.h

@@ -16,8 +16,10 @@ typedef enum {
     ScreenshotModeApps
 } Mode;
 
-
 class ScreenshotService {
+
+private:
+
     Mutex mutex;
     std::unique_ptr<ScreenshotTask> task;
     Mode mode = ScreenshotModeNone;
@@ -25,9 +27,23 @@ class ScreenshotService {
 public:
 
     bool isTaskStarted();
+
+    /** The state of the service. */
     Mode getMode();
+
+    /** @brief Start taking screenshot whenever an app is started
+     * @param[in] path the path to store the screenshots at
+     */
     void startApps(const char* path);
-    void startTimed(const char* path, uint8_t delay_in_seconds, uint8_t amount);
+
+    /** @brief Start taking screenshots after a certain delay
+     * @param[in] path the path to store the screenshots at
+     * @param[in] delayInSeconds the delay before starting (and between successive screenshots)
+     * @param[in] amount 0 = indefinite, >0 for a specific
+     */
+    void startTimed(const char* path, uint8_t delayInSeconds, uint8_t amount);
+
+    /** @brief Stop taking screenshots */
     void stop();
 };