improve cmake instruction and rename it to INSTALL.GIT.md

INSTALL.GIT.md

@@ -0,0 +1,71 @@
+# autotools (LINUX/UNIX , msys...)
+
+
+If you have cloned Tesseract from Github, you must generate
+the configure script.
+
+If you have tesseract 3.0x installation in your system, please remove it
+before new build.
+
+Known dependencies for training tools (excluding leptonica):
+ * compiler with c++ support
+ * pango-devel
+ * cairo-devel
+ * icu-devel
+
+So, the steps for making Tesseract are:
+
+    $ ./autogen.sh
+    $ ./configure
+    $ make
+    $ sudo make install
+    $ make training
+    $ sudo make training-install
+
+You need to install at least English language data file to TESSDATA_PREFIX
+directory. All language data files can be retrieved from git repository:
+    $ git clone https://github.com/tesseract-ocr/tessdata.git tesseract-ocr.tessdata
+(Repository it huge - more that 1.2Gb. You do not need to download
+all languages)
+
+To compile ScrollView.jar you need to download piccolo2d-core-3.0.jar
+and [piccolo2d-extras-3.0.jar](http://search.maven.org/#search|ga|1|g%3A%22org.piccolo2d%22) and place them to tesseract/java.
+
+Than run:
+    $ make ScrollView.jar
+
+and follow instruction on [Viewer Debugging wiki](https://github.com/tesseract-ocr/tesseract/wiki/ViewerDebugging).
+
+
+# CMAKE
+
+There is alternative build system based on multiplatform [cmake](https://cmake.org/)
+
+## LINUX
+
+    $ mkdir build
+    $ cd build && cmake .. && make
+    $ sudo make install
+
+
+## WINDOWS
+
+You need to use leptonica with cmake patch:
+    git clone https://github.com/egorpugin/leptonica.git
+    cd leptonica
+    mkdir build
+    cd build
+    cmake ..
+    cmake --build .
+
+    git clone https://github.com/tesseract-ocr/tesseract.git
+    cd tesseract
+    mkdir build
+    cd build
+    cmake .. -DLeptonica_BUILD_DIR=/abs/path/to/leptonica/build
+    cmake --build .
+
+
+# WINDOWS Visual Studio
+
+Please read http://vorba.ch/2014/tesseract-3.03-vs2013.html