Activity: added 'Commits by Timezone'.

gitstats

 		self.last_active_day = None
 		self.active_days = 0
 
+		# timezone
+		self.commits_by_timezone = {} # timezone -> commits
+
 		# tags
 		self.tags = {}
 		lines = getpipeoutput(['git show-ref --tags']).split('\n')
 
 		# Collect revision statistics
 		# Outputs "<stamp> <author>"
-		lines = getpipeoutput(['git rev-list --pretty=format:"%at %an" HEAD', 'grep -v ^commit']).split('\n')
+		lines = getpipeoutput(['git rev-list --pretty=format:"%at %ai %an" HEAD', 'grep -v ^commit']).split('\n')
 		for line in lines:
 			# linux-2.6 says "<unknown>" for one line O_o
 			parts = line.split(' ')
 				stamp = int(parts[0])
 			except ValueError:
 				stamp = 0
-			if len(parts) > 1:
+			timezone = parts[3]
+			if len(parts) > 4:
 				author = ' '.join(parts[1:])
 			date = datetime.datetime.fromtimestamp(float(stamp))
 
 				self.last_active_day = yymmdd
 				self.active_days += 1
 
+			# timezone
+			self.commits_by_timezone[timezone] = self.commits_by_timezone.get(timezone, 0) + 1
+
 		# TODO Optimize this, it's the worst bottleneck
 		# outputs "<stamp> <files>" for each revision
 		self.files_by_stamp = {} # stamp -> files
 			fg.write('%d %d\n' % (yy, data.commits_by_year[yy]))
 		fg.close()
 
+		# Commits by timezone
+		f.write(html_header(2, 'Commits by Timezone'))
+		f.write('<table><tr>')
+		f.write('<th>Timezone</th><th>Commits</th>')
+		max_commits_on_tz = max(data.commits_by_timezone.values())
+		for i in sorted(data.commits_by_timezone.keys(), key = lambda n : int(n)):
+			commits = data.commits_by_timezone[i]
+			r = 127 + int((float(commits) / max_commits_on_tz) * 128)
+			f.write('<tr><th>%s</th><td style="background-color: rgb(%d, 0, 0)">%d</td></tr>' % (i, r, commits))
+		f.write('</tr></table>')
+
 		f.write('</body></html>')
 		f.close()