Updated INSTALL documentation. (#140)

* KeePassCR -> KeePassXC in INSTALL
* Added .md extension to INSTALL.

INSTALL.md

@@ -0,0 +1,101 @@
+Install KeePassXC
+=================
+
+This document will guide you across the steps to install KeePassXC.
+You can visit the online version of this document a the following link
+
+https://github.com/keepassxreboot/keepassx/wiki/Install-Instruction-from-Source
+
+
+Build Dependencies
+==================
+
+The following tools must exist within your PATH:
+
+* make
+* cmake (>= 2.8.12)
+* g++ (>= 4.7) or clang++ (>= 3.0)
+
+The following libraries are required:
+
+* Qt 5 (>= 5.2): qtbase and qttools5
+* libgcrypt (>= 1.6)
+* zlib
+* libmicrohttpd
+* libxi, libxtst, qtx11extras (optional for auto-type on X11)
+
+
+Prepare the Building Environment
+================================
+
+Building Environment on Linux    ==> https://github.com/keepassxreboot/keepassx/wiki/Building-Environment-on-Linux
+Building Environment on Windows  ==> https://github.com/keepassxreboot/keepassx/wiki/Building-Environment-on-Windows
+Building Environment on MacOS    ==> https://github.com/keepassxreboot/keepassx/wiki/Building-Environment-on-MacOS
+
+
+Build Steps
+===========
+
+To compile from source, open a **Terminal (on Linux/MacOS)** or a **MSYS2-MinGW shell (on Windows)**<br/>
+**Note:** on Windows make sure you are using a **MINGW shell** by checking the label before the current path
+
+Navigate to the path you have downloaded KeePassXC and type these commands:
+
+```
+mkdir build
+cd build
+cmake -DWITH_TESTS=OFF
+make
+```
+
+**Note:** If you are on MacOS you must add this parameter to **Cmake**, with the Qt version you have installed<br/> `-DCMAKE_PREFIX_PATH=/usr/local/Cellar/qt5/5.6.2/lib/cmake/`
+
+You will have the compiled KeePassXC binary inside the `./build/src/` directory.
+
+Common cmake parameters
+```
+-DCMAKE_INSTALL_PREFIX=/usr/local
+-DCMAKE_VERBOSE_MAKEFILE=ON
+-DCMAKE_BUILD_TYPE=<RelWithDebInfo/Debug/Release>
+-DWITH_GUI_TESTS=ON
+```
+
+
+Installation
+============
+
+To install this binary execute the following:
+
+```bash
+sudo make install
+```
+
+You can specify the destination dir with
+```
+DESTDIR=X
+```
+
+
+Packaging
+=========
+
+You can create a package to redistribute KeePassXC (zip, deb, rpm, dmg, etc..)
+```
+make package
+```
+
+
+Testing
+=======
+
+You can perform test on the executable
+```
+make test
+```
+
+Common parameters:
+```
+CTEST_OUTPUT_ON_FAILURE=1
+ARGS+=-jX
+ARGS+="-E testgui"
+```