Don't fail cleaning after reconcile when some buffer have been killed

If buffer in leger-buf has been killed, ledger-reconcile-quit-cleanup
will fail with an error. Better to do nothing.
Fix bug 916 along amount in region
Fix bug 915, maintain post in ledger buffer after save during reconciliation.
Merge pull request #168 from vanicat/t/clean-no-fail

Don't fail cleaning after reconcile when some buffer have been killed
Fix Bug 929 consistent naming of buffer narrowing.
Fixed Bug 930 Toggle transaction menu entry incorrect
Bug 931 Menu consistency Delete Transaction
ledger-mode.texi patches from Thierry
Rewrote ledger-post-align-postings to address bugs 923 924 925 926 927 and 928.
Finish bug 929 got rid of all references to folding, use narrowing instead.
Bug 915 maintain point in buffer when saved.
More armor plating on ledger-post-align-postings
Merge remote-tracking branch 'refs/remotes/origin/next' into t/refresh-on-save

Conflicts:
	lisp/ldg-reconcile.el