Added SQLITE_SCANSTAT_SELECTID. Change the value returned by

SQLITE_SCANSTAT_EST from sqlite3_int64 to double.  Enhanced the formatting
and display of scan statistics using the ".scanstats on" command in the
shell.

FossilOrigin-Name: 20c7614addb8494cd7f40263a50fa6f428cce1c7

diff --cc manifest
index a8453434a24f572706e02f4a64bbdc7240a6fd22,3bbd6d3bd35b1c25274d93d9fbe59e961511b6b9..277b0baf4c6607f76ef1cd968ef9545722895435
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fixes\sto\sthe\sWindows\sVFS\sto\sallow\smemory\smapped\sfiles\sto\swork\swithout\sWAL\ssupport.
- D 2014-11-05T21:34:56.096
 -C Further\simprovements\sto\sthe\s".scanstats\son"\sdisplay\sin\sthe\sshell.\s\sBe\ssure\nto\sshow\sthe\sresults\sof\sall\ssubqueries\seven\sif\sthere\sare\sgaps\sin\sthe\s\nSELECTID\svalues.\s\sAdd\s".scanstats"\sto\sthe\s".help"\soutput.
 -D 2014-11-06T12:46:16.708
++C Added\sSQLITE_SCANSTAT_SELECTID.\s\sChange\sthe\svalue\sreturned\sby\nSQLITE_SCANSTAT_EST\sfrom\ssqlite3_int64\sto\sdouble.\s\sEnhanced\sthe\sformatting\nand\sdisplay\sof\sscan\sstatistics\susing\sthe\s".scanstats\son"\scommand\sin\sthe\nshell.
++D 2014-11-06T14:43:53.299
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in cf57f673d77606ab0f2d9627ca52a9ba1464146a
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1211,8 -1211,7 +1211,8 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 83a1e5db926b3a6d40f4a5cf9a8e6852b9bac9ac 6fc4ead26d19b9348bbda34c3053ae1e066abc32
- R 3ad47b2ac5693ba63ff5c591cf540d89
- T +closed 6fc4ead26d19b9348bbda34c3053ae1e066abc32
 -P d1c51c8455d5ce972a77720c2d56228646ced27c
++P 272fddc14cc322655eeba670bc0f9fc30e5a804c ee922682bb7235dbcd23a22fcfdfa188f6d3228a
+ R 1f66f00948a1acda590c099646f9e3d3
++T +closed ee922682bb7235dbcd23a22fcfdfa188f6d3228a
  U drh
- Z ee3b32335a4c8630acaf81919b28b64e
 -Z 2bc412ec02d784f50574dd160207db0a
++Z 1da4b43998d0836d48029478818e14c6

diff --cc manifest.uuid
index b558f0927472029aef1c2d25d801255cc938c259,5ac436c5348828a5370165f54457cc41c67d38ea..1e9e58656e00ccbd2b560118c81eebd715da04ad
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 272fddc14cc322655eeba670bc0f9fc30e5a804c
 -ee922682bb7235dbcd23a22fcfdfa188f6d3228a
++20c7614addb8494cd7f40263a50fa6f428cce1c7