Migrate RTD documentation from AboutCode to DeltaCode

Signed-off-by: Chin Yeung Li <tli@nexb.com>

docs/source/deltacode/comprehensive_installation.rst

@@ -0,0 +1,125 @@
+Comprehensive Installation
+==========================
+
+DeltaCode requires Python 2.7.x and is tested on Linux, Mac, and Windows. Make sure Python 2.7 is
+installed first.
+
+System Requirements
+-------------------
+
+- Hardware : DeltaCode will run best with a modern X86 processor and at least 1GB of RAM and 250MB
+  of disk.
+
+- Supported operating systems : DeltaCode should run on these OSes:
+
+    #. Linux: on most recent 64-bit Linux distributions (32-bit distros are only partially
+       supported),
+    #. Mac: on recent Mac OSX (10.6.8 and up),
+    #. Windows: on Windows 7 and up (32- or 64-bit) using a 32-bit Python.
+
+Prerequisites
+-------------
+
+DeltaCode needs a Python 2.7 interpreter.
+
+- **On Linux**:
+
+    Use your package manager to install ``python2.7``. If Python 2.7 is not available from your
+    package manager, you must compile it from sources.
+
+    For instance, visit https://github.com/dejacode/about-code-tool/wiki/BuildingPython27OnCentos6
+    for instructions to compile Python from sources on Centos.
+
+- **On Windows**:
+
+    Use the Python 2.7 32-bit (e.g. the Windows x86 MSI installer) for X86 regardless of whether
+    you run Windows on 32-bit or 64-bit. **DO NOT USE Python X86_64 installer** even if you run
+    64 bit Windows.
+
+    Download Python from this url:
+    https://www.python.org/ftp/python/2.7.14/python-2.7.14.msi
+
+    Install Python on the c: drive and use all default installer options.
+    See the Windows installation section for more installation details.
+
+- **On Mac**:
+
+    Download and install Python from this url:
+
+    https://www.python.org/ftp/python/2.7.14/python-2.7.14-macosx10.6.pkg
+
+Installation on Linux and Mac
+-----------------------------
+
+Download and extract the latest ScanCode release from:
+https://github.com/nexB/deltacode/releases/latest
+
+Open a terminal in the extracted directory and run::
+
+    ./deltacode --help
+
+This will configure DeltaCode and display the command line help.
+
+Installation on Windows
+-----------------------
+
+Download the latest ScanCode release zip file from:
+https://github.com/nexB/deltacode/releases/latest
+
+- In Windows Explorer, select the downloaded DeltaCode zip and right-click.
+
+- In the pop-up menu select 'Extract All...'
+
+- In the pop-up window 'Extract zip folders' use the default options to extract.
+
+- Once the extraction is complete, a new Windows Explorer window will pop-up.
+
+- In this Explorer window, select the new folder that was created and right-click.
+
+- In the pop-up menu select 'Properties'
+
+- In the pop-up window 'Properties', select the Location value. Copy this in clipboard.
+
+- Press the start menu button.
+
+- In the search box type
+
+::
+
+  cmd
+
+- Select 'cmd.exe' listed in the search results.
+
+- A new 'cmd.exe' window pops-up.
+
+- In this window (aka. a command prompt), type this (this is 'cd' followed by a space)
+
+::
+
+ cd
+
+- then right-click in this window and select Paste. This will paste the path where you extracted
+  DeltaCode.
+
+- Press Enter.
+
+- This will change the current location of your command prompt to the root directory where
+  DeltaCode is installed.
+
+- Then type
+
+::
+
+  deltacode --help
+
+- Press enter. This will configure your DeltaCode installation.
+
+- Several messages are displayed followed by the deltacode command help.
+
+- The installation is complete.
+
+Un-installation
+---------------
+
+- Delete the directory in which you extracted DeltaCode.
+- Delete any temporary files created in your system temp directory under a deltacode directory.