Bump trunk version to 24.1.50.

Bump trunk version to 24.1.50.

* README, configure.in (AC_INIT): Bump version to 24.1.50.

* doc/emacs/emacsver.texi (EMACSVER): Bump version to 24.1.50.

* doc/man/emacs.1: Bump version to 24.1.50.

* msdos/sed2v2.inp: Bump version to 24.1.50.

* nextstep/Cocoa/Emacs.base/Contents/Info.plist:
* nextstep/Cocoa/Emacs.base/Contents/Resources/English.lproj/InfoPlist.strings:
* nextstep/GNUstep/Emacs.base/Resources/Info-gnustep.plist:
* nextstep/GNUstep/Emacs.base/Resources/Emacs.desktop:
Bump version to 24.1.50.

* nt/config.nt, nt/makefile.w32-in, nt/emacs.rc, nt/emacsclient.rc:
Bump version to 24.1.50.