Include GTests

[Agustin Alba Chicar]

Include GTests into the repository:

• Create the configuration and compilation files.
• Provide a sample test file.
• Define an appropriate way of running tests on the dev process.

[Andrés Fortier]

Issue #44 was marked as a duplicate of this issue.

[Javier Iván Choclin]

First approach to new structure compiling structure with tests. refs #35

→ <<cset 5df3ffba5aa2>>

[Javier Iván Choclin]

Removed all CMakeLists.txt file and defined the new one. Also, included a sample assert-true test. refs #35

→ <<cset 8bd5e8bcd369>>

[Javier Iván Choclin]

Correct readme. refs #35

→ <<cset 2c5885320e03>>

[Javier Iván Choclin]

Added files to CMakeLists.refs #35

→ <<cset 2a382b693e90>>

[Javier Iván Choclin]

CMakeLists.txt reorder source files. refs #35

→ <<cset a945d8652a96>>

[Javier Iván Choclin]

Removed warnings. Still not working. refs #35

→ <<cset 5d9e1ae47b33>>

[Javier Iván Choclin]

Solved issues. refs #35

→ <<cset 37e41c83f235>>