Remove deprecated &fields property
Add next, prev, index selectors
Add selectors for random child, child count, parent count (level), MIGX row count
v2.0
Documentation updates for 2.0
Add first and last sibling selectors
Add 'json' selector, an alias for 'migx'
Formatting fixes
Make childR selector persistent for a given parent, better bounds checking, bug fixes
documentation changes
minor documentation updates
minor documentation update
Merge pull request #1 from oo12/dev

v2.0.0-pl