Add Xertion to network list

Closes #939
Fix whitespace...
Use glib to format filesize in dccgui
win32: Update gtk theme description in installer
Fixes #928 again.  In scrollback replay, skip every line that starts 0x0d.
Merge branch 'master' of https://github.com/hexchat/hexchat.git
Fix #928.  Fix memory leak, mea culpa.
Merge branch 'master' of https://github.com/hexchat/hexchat.git