add template to all libs

avoid unset variable errors
fix wrong path for git checkout
git-cloning more flexible
add some new git sources
fix download errors

* Git point not exist
* Follow git option
No Kiss for VS
implement GLFW => first VS complete lib
tess2 for VS2013
GLFW 3.0.2
add vsbuild function & make vs version a variable

* VS_VER => Visual Studio version
* function vs-build() <"path/to/sol.sln"> [action] [config]
* improve GLFW doc
add assimp git variables

don't forget addons, but they need to define some tags (at least one...)
avoid errors if no git tag
allow poco to use git option
updated libpng download link, closes #8
Merge branch 'master' of github.com:danomatika/apothecary
first vs cmake implementation
Merge remote-tracking branch 'add-git' into vs

Conflicts:
	scripts/apothecary/apothecary
add tess2 patch
fix vs-build function

args not well printed
typo vs-build