Added Linux build instructions.

docs/BUILD-INSTRUCTIONS-LINUX.md

@@ -0,0 +1,35 @@
+gLabels Linux Build Instructions
+================================
+
+# Prerequisites
+
+- g++
+- CMake 2.8.12+
+- Qt5 5.4+ Development Packages ( Qt5Core, Qt5Widgets, Qt5PrintSupport, Qt5Xml, Qt5Svg )
+- zlib 1.2+ Development Package
+
+> Even if the above library packages are installed, their corresponding development packages
+> may also need to be installed.  Development packages are usually named somegthing like
+> libraryName-dev or libraryName-devel.
+
+# Cloning/Downloading
+
+To clone the gLabels source:
+
+```
+$ git clone https://github.com/jimevins/glabels-qt.git
+```
+
+
+# Compiling and Install
+
+gLabels uses the CMake meta build system.  Use the following commands to build and install gLabels:
+
+```
+$ cd ./glabels-qt
+$ mkdir build
+$ cd build
+$ cmake ..
+$ make
+$ sudo make install
+```