WL#2534: Full-text: overview of tasks

This is a meta-task, always "in-progress"
Just an easy way to see all full-text tasks at once
(they are dependencies of this one).

WL#284: Fulltext: per-ft_index options
WL#639: rework stopword handling in fulltext search
WL#828: Combined BTREE/FULLTEXT indexes
WL#1025: More fulltext control functions
WL#1039: Background updating of fulltext indexes
WL#1171: Unsafe optimization in Natural Language Full-Text Search
WL#1173: better cost estimation in find_best for Full-Text
WL#2423: Stemming for full-text
WL#2428: Dictionary for fulltext
WL#2466: Fulltext: "always-index" words
WL#2476: Fuzzy operations for fulltext
WL#2535: smarter "index merge" in fulltext
WL#2556: Fulltext Index for MySQL Cluster
WL#2559: Enable fulltext search for non-MyISAM engines
WL#2565: support relative column weights in the index
WL#2569: Replace trees with hashes in Full-Text Search
WL#2571: replace a tree with priority queue in Natural Language Full-Text Search
WL#2572: avoid unnecessary row reads in Full-Text Search
WL#2573: remove Natural Language Full-Text Search limitations from boolean mode
WL#2574: Fulltext support for MERGE tables
WL#2575: Fulltext: Parser plugin for FTS
WL#2576: support non-const expressions in MATCH ... AGAINST
WL#2577: proximity operators in boolean Full-Text Search
WL#3047: Fulltext: "index merge" join method on fulltext indexes