Add the "changeset" command-line tool for analyzing and manipulating

changesets in files on disk.  Add the ".session" command to the command-line
tool.

FossilOrigin-Name: 31addb627fdbaeb908e0611ad82f6db7537428ea

diff --cc manifest
index 2c280b2e56774fdc34a2b0adc81ceedf80ae03b3,b89595db02a40b33d2142b8a69eb22210b9cc6aa..3199c225979e5e6935a473b0b055e54ca5f7dabf
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Add\smiscellaneous\stest\scases\sto\simprove\scoverage\sof\ssessions\smodule.
- D 2014-08-18T16:03:46.849
 -C A\sreasonably\scomplete\simplementation\sof\sthe\s"changeset"\scommand-line\stool\nand\sthe\s".sessions"\scommand\sin\sthe\scommand-line\sshell.
 -D 2014-08-18T20:01:31.177
++C Add\sthe\s"changeset"\scommand-line\stool\sfor\sanalyzing\sand\smanipulating\nchangesets\sin\sfiles\son\sdisk.\s\sAdd\sthe\s".session"\scommand\sto\sthe\scommand-line\ntool.
++D 2014-08-18T20:08:25.748
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 639859a6f81bd15921ccd56ddbd6dfd335278377
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -143,7 -143,8 +143,8 @@@ F ext/rtree/rtree_util.tcl 06aab2ed5b82
  F ext/rtree/sqlite3rtree.h 83349d519fe5f518b3ea025d18dd1fe51b1684bd
  F ext/rtree/tkt3363.test 142ab96eded44a3615ec79fba98c7bde7d0f96de
  F ext/rtree/viewrtree.tcl eea6224b3553599ae665b239bd827e182b466024
 -F ext/session/session1.test 894e3bc9f497c4fa07a2aa3271e3911f3670c3d8
+ F ext/session/changeset.c 9be709cea346d65c6d0cc8bf03569956af125462
 +F ext/session/session1.test 3733d71eb9a99b14d51fa5219d5b8a82407c3be8
  F ext/session/session2.test 99ca0da7ddb617d42bafd83adccf99f18ae0384b
  F ext/session/session3.test a7a9ce59b8d1e49e2cc23d81421ac485be0eea01
  F ext/session/session4.test a6ed685da7a5293c5d6f99855bcf41dbc352ca84
@@@ -1202,7 -1203,7 +1203,8 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 419d286a2fc465f6e0f9662909d0cc52a18eefa4
- R 317ae23cec852c0c0a1e8f934088d0af
- U dan
- Z 05b5d773ef95bfd2114231b8fc3c0f06
 -P 55bb3544a6b474c04853270067a35ca4b0079f52
 -R e1146ecf2575392bb0feff21eda4606c
++P 0fac6cfffe628ea02c78ebad065307309ec9eaa1 7b12f1f9c012f33d376242920583807b014b3287
++R 7a7a7eda9e9e796cac11d47296a11e68
++T +closed 7b12f1f9c012f33d376242920583807b014b3287
+ U drh
 -Z 0de9dc1123705f1abdab4ea8e245122b
++Z bd91644aa3e055b27f4fc846b7cc054f

diff --cc manifest.uuid
index 9547ac51a636ae0ea2ecac0751dcb02a00a9e2ff,447ba14ee19e8ea2a1fec845a184232d05647287..af042500c51d68b9b498f56c671c96c356b94ca0
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 0fac6cfffe628ea02c78ebad065307309ec9eaa1
 -7b12f1f9c012f33d376242920583807b014b3287
++31addb627fdbaeb908e0611ad82f6db7537428ea