cmake: set minimum Boost version 1.53.0

boost::multiprecision was introduced in 1.53.0, which has been tested
successfully with PFASST++

this fixes #104
docu: fix and extend installing instructions
travis: removed; not needed any more
cmake: fixing a few typos

stupid copy&paste ...
cmake: prepare FindEasyloggingpp module
cmake: rework 3rd-party library detection and reporting

By using the 'FeatureSummary' module we can easily produce a nice
summary of features and dependend libraries/packages at the end of each
CMake run.

However, to tell CMake that certain libraries/packages which have not
been found on the system will be downloaded and prepared automatically
on the first call to 'make', a dirty hack on CMakes (not documented)
internal handling of the 'find_package' command is required.
I hope somebody else or the future me can actually understand what I was
doing right now ...
cmake: finish advanced feature and package reporting

isn't this awesome? :-)
cmake: stupid renaming...
Merge pull request #119 from torbjoernk/feature/boost-version

cmake: set minimum Boost version 1.53.0
Merge branch 'development' into feature/build-tweaks

* development:
  cmake: set minimum Boost version 1.53.0

Signed-off-by: Torbjörn Klatt <t.klatt@fz-juelich.de>

Conflicts:
	3rdparty/CMakeLists.txt
Merge branch 'development' into feature/docu-fixes

* development:
  cmake: set minimum Boost version 1.53.0

Signed-off-by: Torbjörn Klatt <t.klatt@fz-juelich.de>

Conflicts:
	doc/source/installing.md
Merge pull request #120 from torbjoernk/feature/docu-fixes

docu: fix and extend installing instructions
Merge pull request #121 from torbjoernk/feature/build-tweaks

Some awesome CMake tweaks and tricks for advanced feature reporting at the end of a CMake run