ISS Error-checking; Documentation Tweaks

* Correct README statements about shared folders
* Tidy README & documentation with Pandoc
* More robust defines, comments and error messages in ISS
Merge pull request #52 from ThePacielloGroup/iss-error-checking-and-docs-tweaks

ISS Error-checking; Documentation Tweaks
Fixes #32

- added message to make a selection, to View Partial Source alert
dialog,
- added 'frames' info to lang attributes alert to make more sense
- added fix to title attribute, so function does not try to write to SVG
elements
- added an error message to translation.ini, for localization
Merge pull request #54 from menovak/master

Fixes #32