#10 Add the X-WR-CALNAME property to the ICS

Giggity doesn't like when it's missing.

@mmu_man, Thanks for the PR!

The patch looks good except for two minor nits:

• To maintain uniformity with the rest of the self.cal.add calls in __init__, it would be nice to make X-WR-CALNAME lowercase (x-wr-calname).
• Instead of the lp_year, it would be nice to use self.lp_year.

Oh right, the lib upcases the keys by itself.

There you go :)

Thank you @mmu_man!