slideshare: fix upload slide URL

Change from README title to id (config.yaml) about slideshow title when upload slideshow.
Because slide URL was decided when uploaded slideshow title.
Edit slideshow title to README title after that.
Merge pull request #10 from myokoym/slideshare

slideshare: fix upload slide URL

Patch by Masafumi Yokoyama. Thanks!!!
slideshare: use slideshare_id for ID on SlideShare
doc: improve description about image with RD
Support auto site update by push
Add update task
Add missing public directory
Update git repository before site update
image pdf: check also extension name
image pdf: reduce rescue scope
image pdf: don't use abbreviation name
image pdf: add a missing empty line
image pdf: fix English
image pdf: don't use abbreviation name
image pdf: use 1-origin instead of 0-origin

Because PDF is counted by 1-origin normally.

It's incompatible change. Sorry.
image pdf: include missing GetText module
image pdf: improve error message
Remove needless map
Use exception notification mail
Fix argument