Fixes and improvements

Merge pull request #9 from jfsmig/JFS-default-socket

cmake: fixed gcc version detection

Locates executables with the PATH

Merge pull request #2 from jfsmig/master

Locates binaries with the PATH.

General cleanup + CMAKE_INSTALL_PREFIX

• Log4c dependency dropped
• socket path configurable
• Licenses added.

v1.3: General cleanup

* Log4c dependency dropped
* socket path configurable
* Licenses added.