Updated build instructions

INSTALL

-Required libraries
-------------------
+------------------------------------------------------------------------------
+How to build and deploy application to the device or app store?
+Guide in Czech is available on address:
+https://gitlab.labs.nic.cz/datovka/mobile-datovka/wikis/build-instructions
 
-- Qt5.x
-  - QML 2.3
+------------------------------------------------------------------------------
+Main requirements for build:
+------------------------------------------------------------------------------
+- Qt5.6 or later
+  - QML 2.3 or later
   - Application requires the Qt sqlite database driver.
-- OpenSSL
+- OpenSSL (use crypto a cms)
 
 
-Compilation on Linux
---------------------
+------------------------------------------------------------------------------
+Build for Linux like systems
+------------------------------------------------------------------------------
+1. qmake mobile-datovka.pro
+2. make
 
-qmake
-make
 
+------------------------------------------------------------------------------
+Build and deployment for Android platform
+------------------------------------------------------------------------------
+You must install following tools (Windows/Linux):
+- The Android SDK Tools (https://developer.android.com/studio/index.html)
+- The Android NDK (https://developer.android.com/ndk/index.html)
+- Apache Ant v1.8 or later (http://ant.apache.org/bindownload.cgi)
+- Java SE Development Kit (JDK) v6 or later (http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html)
+How to install these tools is described here: http://doc.qt.io/qt-5/androidgs.html
 
-NOTE: Instructions for build and deployment of application to another platform will be added later.
+- OpenSSL (use batch file in /adroid/openssl/ for build on Windows)
+- On Windows, install SED for Windows (http://gnuwin32.sourceforge.net/packages/sed.htm)
+  - set path to SED binary (C:\Program Files (x86)\GnuWin32\bin\) to Windows PATH. 
+
+On Linux
+--------
+1. qmake mobile-datovka.pro
+2. make
+
+On Windows
+----------
+1. Run QtCreator, open mobile-datovka.pro, set target to android and build it.
+
+
+------------------------------------------------------------------------------
+Build and deployment for iOS platform
+------------------------------------------------------------------------------
+You must install following tools on OSX:
+- Xcode 7 or later
+- CommandLine tools for Xcode
+- OpenSSL (use script file in /ios/openssl/ for build by Xcode)
+
+1. Run QtCreator, open mobile-datovka.pro, set target to ios and run qmake.
+2. Open generated project file in xcode.
+3. Set provisioning profile and build it.
+
+
+------------------------------------------------------------------------------
+Build for Windows Phone/WinRT
+------------------------------------------------------------------------------
+You must install following tools on Windows:
+- Visual Studio 2015 or later
+  - Add "Windows Phone 8.1 SDK" during installation
+
+1. Run batch file in the root of project.
+2. Open generated project file in VS2015
+3. Set target and build it.
+
+
+------------------------------------------------------------------------------
+NOTE: Instructions for deployment of application to device and app stores will be added later.