Update for compilation and installation instructions

indi-astroasis/INSTALL

@@ -1,16 +1,22 @@
 Installation instructions
 =========================
 
-Compile Instructions
-  - Assumption: INDI package installed (see https://indilib.org/download.html)
-  - Retrieve the sources for the Astroasis driver
-    git clone https://github.com/astroasis/indi-3rdparty.git
-  - cd indi-3rdparty
-    checkout branch "master"
-  - mkdir -p build/indi-astroasis
-  - cd build/indi-astroasis
-  - cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug ../../indi-astroasis
-  - sudo make install
+Compilation Instructions
 
-And now start the INDI server and kstars.
+Step 1: build and install libastroasis
+  1) $ cd indi-3rdparty
+  2) $ mkdir -p build/libastroasis
+  3) $ cd build/libastroasis
+  4) $ cmake -DCMAKE_INSTALL_PREFIX=/usr ../../libastroasis
+  5) $ make
+  6) $ sudo make install
+
+Step 2: build and install indi-astroasis
+  1) $ cd indi-3rdparty
+  2) $ mkdir -p build/indi-astroasis
+  3) $ cd build/indi-astroasis
+  4) $ cmake -DCMAKE_INSTALL_PREFIX=/usr ../../indi-astroasis
+  5) $ make
+  6) $ sudo make install
 
+And now start the INDI server and kstars.