installer: update the packages list

- there are some new packages required by LyX's supported document classes and example files
(this list is only used when LyX is installed the first time on a PC together with MiKTeX to shorten the installation time)

development/Win32/packaging/installer/Packages.txt

@@ -1,3 +1,4 @@
+l3experimental
 l3kernel
 l3packages
 mptopdf
@@ -60,10 +61,12 @@ booktabs
 braille
 breakurl
 cancel
+chemgreek
 cjk
 covington
 csquotes
 cyrillic
+datetime
 endnotes
 enumitem
 esint
@@ -71,6 +74,7 @@ eso-pic
 fancybox
 fancyhdr
 filehook
+fmtcount
 framed
 greek-inputenc
 harvard
@@ -138,6 +142,7 @@ garamondx
 mathpazo
 bera
 ccfonts
+classico
 cmbright
 concmath
 concrete
@@ -171,6 +176,7 @@ marvosym
 textgreek
 txfonts
 wasysym
+a0poster
 aastex
 achemso
 aguplus
@@ -179,6 +185,7 @@ apacite
 apa
 arabtex
 beamer
+beamerposter
 bigfoot
 changepage
 cite
@@ -221,6 +228,7 @@ revtex
 revtex4
 sauerj
 savesym
+sciposter
 seminar
 simplecv
 skak
@@ -233,13 +241,17 @@ tugboat
 type1cm
 ucs
 upquote
+wallpaper
 xecjk
 xifthen
+acrotex
 answers
 chicago
+ctablestack
 frankenstein
 jsclasses
 lambda-lists
 mathdesign
 mathtools
-pdfcrop
+pdfcrop
+sansmathaccent