Add implementations for the toInteger() and toReal() SQL functions.

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diff --cc manifest
index 477ef62207025ac1f4a66a915976b6a64c5f3537,5a14be7003c7673dee63386fe730e680a3375ca4..64348ab890ad2373d5a28fba41910c1f762ba707
--- 1/manifest
--- 2/manifest
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@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sfor\sbuilding\swith\sSQLITE_OMIT_FOREIGN_KEY.
- D 2013-10-14T15:41:39.130
 -C Merge\supdates\sfrom\strunk.
 -D 2013-10-12T23:39:49.890
++C Add\simplementations\sfor\sthe\stoInteger()\sand\stoReal()\sSQL\sfunctions.
++D 2013-10-14T19:35:33.432
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@@@ -1123,7 -1124,7 +1124,8 @@@ F tool/vdbe-compress.tcl f12c884766bd14
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
  F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
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diff --cc manifest.uuid
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