Improve submission titles.

Using the EXTRA_SUBJECT intent extra data to
populate the title field in the submission
activity.
Fixed markdown link parsing

Reddit allows markdown links to have a space between the [] and () tags. These links are not parsed correctly by Diode. Here is an example comment (http://www.reddit.com/r/pics/comments/1z5xbz/fishing/cfr7eso) demonstrating this issue. This fix has been tested.
Merge pull request #33 from icantrap/post-titles

Improve submission titles.
Merge pull request #35 from danthingo/markdown-fix

Fixed markdown link parsing
thank icantrap and danthingo for their contribs
version info for 1.1.2
Check if AsyncTask is running when refreshing comments

Check if the task is already running to avoid an exception when
executing. Ideally there should be a check for isCancelled in
doInBackground so the task can be cancelled and then re-run.

Signed-off-by: Michael Shick <mike@shick.in>