org-static-blog.el and index-generator.el refactored

[chatziiola]

• Make sure that there is nothing hardcoded in there and everything (that needs to be modifiable) can be changed either through variables or through the associated function's parameters
• Clean the code up (more than a little bit), and maybe create a diagram somewhere (it might be ideal to delete functions there)
• Consider merging the two files and submitting them to the main repo.

[chatziiola]

Funny how I opened this ticket more than a year ago, never bothered with this and now, feeling tired (as a result of the peculiar circumstances in Greek universities - and my school specifically), I started dealing with what is included in this ticket (without ever seeing it):

• By the end of V3 this will all be complete.