separate git section, main docs apply to downloaded release source (needs update for Linux and Windows)

Author: kyngchaos

doc/INSTALL.t2t

@@ -86,4 +86,6 @@ source directory.
 
 %!include: osx.t2t
 
+%!include: git.t2t
+
 %!include: iauthors.t2t

doc/git.t2t

@@ -0,0 +1,57 @@
+
+= git =[git]
+
+== Installation ==
+
+Optional.  If you want to try different branches and/or easily update the source when changes are made, install git and clone the source.  For random just-want-to-see-what's-going-on-in-development builds, download a tarbal from github.
+
+=== Install git for GNU/Linux ===
+
+=== install git for Windows ===
+
+=== Install git for OSX ===
+
+The [git http://git-scm.com/] project has a downloadable build of git.
+Make sure to get the package matching your processor (x86_64 most likely, only the first Intel Macs need the i386 package).
+
+Once downloaded open the disk image and run the installer.
+
+__PPC/source note__
+
+The git site does not offer PPC builds.  If you need a PPC build, or you just want
+a little more control over the installation, you need to compile it yourself.
+
+Download the source from http://git-scm.com/.  Unzip it, and in a Terminal cd to the source folder, then:
+
+```
+make prefix=/usr/local
+sudo make prefix=/usr/local install
+```
+
+If you don't need any of the extras, Perl, Python or TclTk (GUI), you can disable them before running make with:
+
+```
+export NO_PERL=
+export NO_TCLTK=
+export NO_PYTHON=
+```
+
+== Get QGIS from git ==
+
+You can download a development tarball (no git installation needed) from:
+
+http://github.com/qgis/Quantum-GIS
+
+This defaults to the current master, but you can select any other branch or tag as desired.
+
+Or for more long-term testing of development sources: clone the sources with git (in an appropriate location on your computer):
+
+``` 
+git clone git://github.com/qgis/Quantum-GIS.git
+```
+
+This automatically activates the master.  To switch to another branch:
+
+```
+git checkout [branchname]
+```

doc/osx.t2t

@@ -334,47 +334,11 @@ make
 sudo make install
 ```
 
-== Install git for OSX ==
+== QGIS source ==
 
-The [git http://git-scm.com/] project has a downloadable build of git.
-Make sure to get the package matching your processor (x86_64 most likely, only the first Intel Macs need the i386 package).
+Unzip the QGIS source tarball to a working folder of your choice (/usr/somewhere is not a good choice as it's hidden and requires root privileges).  If you are reading this from the source, you've already done this.
 
-Once downloaded open the disk image and run the installer.
-
-__PPC/source note__
-
-The git site does not offer PPC builds.  If you need a PPC build, or you just want
-a little more control over the installation, you need to compile it yourself.
-
-Download the source from http://git-scm.com/.  Unzip it, and in a Terminal cd to the source folder, then:
-
-```
-make prefix=/usr/local
-sudo make prefix=/usr/local install
-```
-
-If you don't need any of the extras, Perl, Python or TclTk (GUI), you can disable them before running make with:
-
-```
-export NO_PERL=
-export NO_TCLTK=
-export NO_PYTHON=
-```
-
-== Check out QGIS from git ==
-
-Now we are going to check out the sources for QGIS. First we will create a
-directory for working in (or some folder of your choice):
-
-``` 
-mkdir -p ~/dev/cpp cd ~/dev/cpp 
-```
-
-Now we check out the sources:
-
-``` 
-git clone git://github.com/qgis/Quantum-GIS.git
-```
+If you want to experiment with the latest development sources, see the [git #git] section below.
 
 == Configure the build ==