Supports EXPLODE, LATERAL VIEW, NOT RLIKE, NOT RLIKE ANY, TRIM, ABS, BETWEEN, NOT BETWEEN, SUBSTRING, UNIXTIMESTAMP

This release updates to Bullet Core 1.3.1 and adds support in BQL for:

EXPLODE - for exploding maps and lists into constituents in the SELECT or with a LATERAL VIEW
LATERAL VIEW - to be used with EXPLODE to generate a cross product with the exploded field and a row for all rows in a result
NOT RLIKE, NOT RLIKE ANY - the NOT versions of the supported RLIKE and RLIKE ANY
BETWEEN and NOT BETWEEN - two functions to check if a numeric or a string typed value is between two other values or fields
SUBSTRING - to get parts of a String with support for negative indexing
UNIXTIMESTAMP - to get the current UTC unix timestamp or to convert a given date argument or field into a unix timestamp with an optional pattern for parsing the date