added .pro file for the headless version of YACReader and a specific main file for the project

INSTALL.txt

@@ -0,0 +1,75 @@
+COMPILATION GUIDE FOR LINUX/UNIX USERS
+**********************************
+YACReader and YACReaderLibrary are build using qmake. To build and install the program, run:
+
+qmake-qt5 CONFIG+=[Options]
+make
+make install
+
+from the source dir. For seperate builds of YACReader or YACReaderLibrary, enter their respective subfolders and run the commands from there.
+
+Dependencies:
+-----------------------
+
+- Qt >= 5.3 with the following modules:
+	- declarative
+	- sql
+	- script
+	- multimedia
+	- imageformats
+	- opengl
+	- sql-sqlite
+	
+- poppler-qt5
+- qrencode
+- sqllite
+- glu
+- a decompression backend, either 7zip or unarr (see below)
+
+
+Decompression backend:
+---------------------------------------
+
+YACReader supports two decompression backends:
+
+- unarr
+- p7zip=9.20.1
+
+These can be selected at build time by adding either CONFIG+=unarr or CONFIG+=7zip as an option when running qmake. 
+If none of these is provided, the build system will default to unarr on Linux/Unix and [p]7zip on Windows and OS X.
+
+The decompression backends have their own dependencies and require additional steps like downloading additional source code
+for setup. Please consult the README files provided in the compressed_archive and compressed_archive/unarr folders for details.
+
+If you chose to build YACReader with p7zip as a backend on Linux/Unix, please take notice that this backend has some problems:
+
+- p7zip > 9.20.1 is not supported
+- p7zip 9.20.1 has known bugs that are fixed only in the later versions
+- a system update that replaces p7zip 9.20.1 with a later version will make YACReader unusable
+
+If your system already ships with p7zip > 9.20.1 you can place 7z.so and the Codecs folder with the Rar29.so from p7zip 9.20.1 in /usr/lib/yacreader 
+YACReader will check this folder first and can thus continue using 7zip as a backend with p7zip > 9.20.1 installed on your system.
+
+Other build options:
+---------------------
+
+You can adjust the installation prefix as well als the path make install uses to install the files.
+Use "qmake PREFIX=DIR" to configure YACReader for your systems default prefix (for example "/", "/usr", "/usr/local").
+
+For packaging purposes, you can use "make install INSTALL_ROOT=DIR" to install to a different location than the prefix.
+
+Default values:
+
+PREFIX=/usr
+INSTALL_ROOT=""
+
+On embedded devices that don't support desktop OpenGL, it is recommended to use the no_opengl config option:
+
+qmake CONFIG+=no_opengl
+
+This will remove any dependency on desktop OpenGL and hardlock rendering to software.
+
+
+DO YOU WANT TO HELP YACREADER?
+******************************
+If you have experience creating packages, please help to create a package for your favourite Linux distro! Send me an e-mail to: info@yacreader.com