Travis requires many time to execute tests in the project

…JakubVanek

Adding Unit Test to execute UnitTest for all ideas.
Some test are failing in all proposals.

When using cached file descriptors, differences between
the sysfs filesystem and normal filesytems show up.
In particular, extraneous data are not persisted between
individual write calls (in sysfs, they're handed to the
kernel driver; reads are again handled by a kernel driver).

This commit repairs the illusion by opening and closing
the file for each read/write separately.

# Conflicts:
#	src/test/java/fake_ev3dev/ev3dev/utils/io/SysfsFile.java

Add LRU-cached Sysfs to the contest

However, the primary information source should always be the manpages:
https://man7.org/linux/man-pages/dir_section_2.html

Upgrading build.gradle for JMH tests. It is necessary to review to merge to master.
Adding JMH Tests
Updating MANIFEST.MF to point to JMH main program for testing on EV3

docs: add ILibc documentation (to sysfs_perf)

… /sys/class/lego-sensor/sensor0/value0 . From a primitive measurement it's a boost of about 2x

…et it.

…mization

…String in Sysfs2.

Channel reset

Small refactoring in JMH tests

Adding TimingTest and performance results