Added Local Body data for Kerala

Kerala has 5 Corporations, 54 Municipalities, and 993 Gram Panchayats.

The 5 Corporations cover amongst them 1550 booths, at an average of 310
booths. Thrissur has the least at 210 and Trivandrum has the most at
469.

The 54 Municipalities cover amongst them 1868 booths, at an average of
about 35 booths per Municipality. Guruvayoor has the minimum at 13
booths, and Alapuzha has the maximum at 104 booths.

The 993 Gram Panchayats cover amongst them 18006 booths, at an average
of 18 booths per panchayat. There is one Panchayat with only one booth
- Mupainadu, while Munnar Panchayat has 60 booths.

Some polling centers are shared between Panchayats. In the rare case
that this happens (16 polling centers, covering 25 booths), the polling
center numbers are appended with a .1

Wards are not captured, and will be attempted at a later stage.
Updated zones of Kerala

Kerala has decided to go with 2 zones (North and South) instead of 3.
Each of the two zones contains 7 districts each.
Updated Local Body numbering

Numbering for local bodies (Gram Panchayats and Municipalities) is
confined to within each district. Corporation numbers are across the
state.
Merge pull request #1 from anandjanki/kerala-data-updates

Kerala data updates