Update bundled ACE editor to 1.2.6

[davgothic]

I've updated the bundled ACE editor to 1.2.6.

I've included the changelog below, but most notably is the inclusion of PHP 7 syntax support.

ACE Changelog

2016.12.03 Version 1.2.6

• Fixed IME handling on new Chrome
• Support for php 7 in the syntax checker

2016.08.16 Version 1.2.5

• Fixed regression in noconflict mode

2016.07.27 Version 1.2.4

• Maintenance release with several new modes and small bugfixes

2016.01.17 Version 1.2.3

• Bugfixes

  • fix memory leak in setSession (Tyler Stalder)
  • double click not working on linux/mac

• new language modes

  • reStructuredText (Robin Jarry)
  • NSIS (Jan T. Sott)

2015.10.28 Version 1.2.1

• new language modes
  • Swift
  • JSX

2015.07.11 Version 1.2.0

• New Features

  • Indented soft wrap (danyaPostfactum)
  • Rounded borders on selections

• API Changes

  • unified delta types {start, end, action, lines} (Alden Daniels https://github.com/ajaxorg/ace/pull/1745)
  • "change" event listeners on session and editor get delta objects directly

• new language modes

  • SQLServer (Morgan Yarbrough)

2015.04.03 Version 1.1.9

• Small Enhancements and Bugfixes

[Seldaek]

Thanks