polishing viewerMD
increasing the width of the first column
partly fixing #25 by removing script tags from the content
fixing issue with styles
comment added
changed the max width of the column in perspective list
changed the default height of the html editor
fixing #32, #31, #30, #26
update to version 0.5.0
update to version 0.5.0 with some custom changes
improving perspective ui performance
improving performance
start tagspaces maximized
improved error handling  in node-webkit
improved saving ot UTF8 files
adding webdav api
including webdavlib from sara.nl
refresh file list if the saved file is new