Auto-run layout analysis in G8RecognitionOperation.

Fixes #155.

Author: Kevin Conley

TesseractOCR/G8RecognitionOperation.m

@@ -49,6 +49,9 @@ - (id) initWithLanguage:(NSString *)language
 - (void)main
 {
     @autoreleasepool {
+        // Analyzing the layout must be performed before recognition
+        [self.tesseract analyseLayout];
+        
         [self.tesseract recognize];
     }
 }

TesseractOCR/G8Tesseract.h

@@ -146,6 +146,15 @@ extern NSInteger const kG8MaxCredibleResolution;
  */
 - (NSString *)recognizedHOCRForPageNumber:(int)pageNumber;
 
+/**
+ *  Run Tesseract's page analysis on the target image.
+ *
+ *  @note You must have a file called "osd.traineddata" in the "tessdata"
+ *        folder to use this method. You can download this file from:
+ *        https://code.google.com/p/tesseract-ocr/downloads/list
+ */
+- (void)analyseLayout;
+
 /**
  *  The result of Tesseract's orientation analysis of the target image. See
  *  `G8Orientation` in G8Constants.h for the possible orientations.