Add source related to generation of functionality coverage.

Add python script that generates coverage_table.txt from coverage.csv file
which is included in the sphinx docs.

doc/source/coverage.csv

@@ -0,0 +1,28 @@
+"Make movie from multiframe image                    ", immovie 
+"Play movies, videos, or image sequences             ", implay	 
+"Display image                                       ", imshow	 
+"Image Tool                                          ", imtool	 
+"Display multiple image frames as rectangular montage", montage  
+"Display multiple images in single figure            ", subimage 
+"Display image as texture-mapped surface             ", warp	 
+
+"Read metadata from header file of Analyze 7.5 data set             ",analyze75info
+"Read image data from image file of Analyze 7.5 data set            ",analyze75read
+"Anonymize DICOM file                                               ",dicomanon	 
+"Get or set active DICOM data dictionary                            ",dicomdict	 
+"Read metadata from DICOM message                                   ",dicominfo	 
+"Find attribute in DICOM data dictionary                            ",dicomlookup	 
+"Read DICOM image                                                   ",dicomread	 
+"Generate DICOM unique identifier                                   ",dicomuid	 
+"Write images as DICOM files                                        ",dicomwrite	 
+"Read high dynamic range (HDR) image                                ",hdrread	     
+"Write Radiance high dynamic range (HDR) image file                 ",hdrwrite	 
+"Read metadata from Interfile file                                  ",interfileinfo
+"Read images in Interfile format                                    ",interfileread
+"Check if file is R-Set                                             ",isrset	     
+"Create high dynamic range image                                    ",makehdr	     
+"Read metadata from National Imagery Transmission Format (NITF) file",nitfinfo	 
+"Read image from NITF file                                          ",nitfread	 
+"Open R-Set file                                                    ",openrset	 
+"Create reduced resolution data set from image file                 ",rsetwrite	 
+"Render high dynamic range image for viewing                        ",tonemap

doc/source/coverage_generator.py

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+#!/usr/bin/env python
+
+import csv
+
+def table_seperator(cols,lengths,character="-"):
+    output = "+"
+    output += '+'.join([character*(length+2) for length in lengths])
+    output += "+"
+    return output
+    
+def table_row(data,lengths,num_columns=None):
+    if num_columns is None:
+        num_columns = len(data)
+    output = "|"
+    for i in xrange(num_columns):
+        if len(data)-1 >= i:
+            entry = data[i]
+        else:
+            entry = ""
+        output += " " + entry + " "*(lengths[i] - len(entry)) + " |"
+    return output
+
+csv_path = 'test.csv'
+reader = csv.reader(open(csv_path,'r'),delimiter=',',quotechar='"')
+
+# Find number of columns and column widths, base number of columns is
+# determined by the headers
+page_title = "Coverage Tables"
+print page_title
+print "="*len(page_title)
+print
+table_names = ["Image Display and Exploration","Image File I/O"]
+for table in table_names:
+    num_columns = 3
+    data = [["Functionality","Matlab","Scipy"]]
+    for row in reader:
+        if len(row) == 0:
+            break
+        data.append([entry.expandtabs() for entry in row])
+        num_columns = max(num_columns,len(row))
+
+    column_lengths = [0]*num_columns
+    for row in data:
+        for i in xrange(len(row)):
+            column_lengths[i] = max(column_lengths[i],len(row[i]))
+    
+    print table
+    print "-"*len(table)
+    print
+    print table_seperator(num_columns,column_lengths,character="-")
+    print table_row(data[0],column_lengths,num_columns)
+    print table_seperator(num_columns,column_lengths,character="=")
+    for row in data[1:]:
+        print table_row(row,column_lengths,num_columns)
+        print table_seperator(num_columns,column_lengths,character='-')
+    print
+    print