Do not escape slashes in images href URLs

Fixes #57
Merge pull request #64 from Lucas-C/master

Do not escape slashes in images href URLs
rewrite code to not have warnings about not defined indexes, variables,
or not being able to write files
Slashes unescaping seemed overcomplicated.
Merge pull request #65 from Aldarone/simple-unescaped-slashes

Slashes unescaping seemed overcomplicated.
Merge pull request #63 from bifek/thumbwarnings

quiesce warnings
Merge branch 'master' of github.com:bifek/MinigalNano