- New: added semantic check of variable "TYPE"

- Improved: Added prefix "DL_" to all attributes of the file-array (SOURCE[], FILE[], ..)
- Improved: refactored variable creation and moved code to builder-utils.sh
- New: Added DIST_FORCE_DOWNLOAD variable to select wget or plowdown
- Improvement: refactored code
- New: Added log_info() and log_debug() functions
- New: Added new array WINST_* (builder-product.cfg) to defined custom winst variables

doc/README-7zip.txt

@@ -0,0 +1,12 @@
+- the 7zip version in CentOS does include all features.
+  You can install the version from sf.net
+
+  wget "https://sourceforge.net/projects/p7zip/files/p7zip/9.20.1/p7zip_9.20.1_x86_linux_bin.tar.bz2/download"
+  tar xfvj p7zip_9.20.1_x86_linux_bin.tar.bz2 
+  cd p7zip_9.20.1*
+
+  sh install.sh
+  emacs -nw /etc/profile
+          PATH=/usr/local/bin:$PATH
+          export PATH
+  source /etc/profile