Installing deezerPi on a RaspberryPi 2

[JoBilert]

Hi I am very interested in you project but lack the skills in Ruby to understand the install process.
Everytime I try to install it on my RaspberryPi2 i get the following

Installing eventmachine 1.0.3 with native extensions

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /usr/local/rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20150908-3886-1ctgont.rb extconf.rb
checking for rb_trap_immediate in ruby.h,rubysig.h... no
checking for rb_thread_blocking_region()... no
checking for inotify_init() in sys/inotify.h... yes
checking for writev() in sys/uio.h... yes
checking for rb_wait_for_single_fd()... yes
checking for rb_enable_interrupt()... no
checking for rb_time_new()... yes
checking for sys/event.h... no
checking for epoll_create() in sys/epoll.h... yes
creating Makefile

make "DESTDIR=" clean

make "DESTDIR="
compiling em.cpp
em.cpp: In member function ‘void EventMachine_t::_RunEpollOnce()’:
em.cpp:574:37: error: ‘rb_thread_select’ was not declared in this scope
em.cpp: In member function ‘int SelectData_t::_Select()’:
em.cpp:827:67: error: ‘rb_thread_select’ was not declared in this scope
em.cpp: In member function ‘void EventMachine_t::_RunSelectOnce()’:
em.cpp:946:40: error: ‘rb_thread_select’ was not declared in this scope
Makefile:229: recipe for target 'em.o' failed
make: *** [em.o] Error 1

make failed, exit code 2

Gem files will remain installed in /usr/local/rvm/gems/ruby-2.2.1/gems/eventmachine-1.0.3 for inspection.
Results logged to /usr/local/rvm/gems/ruby-2.2.1/extensions/armv7l-linux/2.2.0/eventmachine-1.0.3/gem_make.out
An error occurred while installing eventmachine (1.0.3), and Bundler cannot
continue.
Make sure that `gem install eventmachine -v '1.0.3'` succeeds before bundling.

I already installed eventmachine in a newer version via gemals the version 1.0.3 does't seem to work anymore but i don't get a positive result.
would be glad if you could help me out.