Log Message:
Update to 4.5.1

Changelog:
4.5.1:
Summary

From the announcement post, WordPress Version 4.5.1 fixes 12 bugs, chief among \ 
them a singular class issue that broke sites based on the Twenty Eleven theme, \ 
an incompatibility between certain Chrome versions and the visual editor, and an \ 
Imagick bug that could break media uploads.

This maintenance release fixes a total of 12 bugs in Version 4.5 including:

Build/Test Tools

    #36498 Shrinkwrap npm dependencies for 4.5

Bundled Theme

    #36510 Twenty eleven page templates with widgets incorrectly styled

Customize

    #36457 Customizer Device Preview: Use px units for tablet preview size

Database

    #36629 Database connect functions can cause un-catchable warnings

Editor

    #36458 Fix support for Safari + VoiceOver when editing inline links

Emoji

    #36604 Emoji skin tone support test incorrectly passing in Chrome

Feeds

    #36620 Feeds using an rss-http content type are now served as \ 
application/octet-stream

Media

    #36501 Fatal error: Undefined class constant 'ALPHACHANNEL_UNDEFINED'
    #36578 wp_ajax_send_attachment_to_editor() bug
    #36621 Don’t cache the results of wp_mkdir_p() in a persistent cache

Rewrite Rules

    #36506 Duplicate directives in web.config after WordPress 4.5 installation \ 
on Windows

TinyMCE

    #36545 WordPress TinyMCE toolbar/tabs unresponsive in Chrome Version \ 
50.0.2661.75 beta-m (64-bit)