Experimental support for Tachyon FS

Changes:
 - added tachyon 0.4.1
 - Persist layer for tachyon
 - url for tachyon is tachyon://<address of server/<filename> - e.g.,
   tachyon://localhost:19998/covtype/covtype.data
Removed transient dependencies for tachyon.
Minor parser helper.
Tachyon libraries
Experimental support for Tachyon FS

Changes:
 - added tachyon 0.4.1
 - Persist layer for tachyon
 - url for tachyon is tachyon://<address of server/<filename> - e.g.,
   tachyon://localhost:19998/covtype/covtype.data
Removed transient dependencies for tachyon.
Minor parser helper.
Tachyon libraries
Mimic Tomas fix for platform vectors.
Fix of missing byte skip during loading
value for chunk.
Fix NPE in Parser if parsing multifile set with empty file.
Merge branch 'MM_tachyon_pers' of github.com:0xdata/h2o into MM_tachyon_pers

Conflicts:
	src/main/java/water/api/ImportFiles2.java
	src/main/java/water/fvec/TachyonFileVec.java
	src/main/java/water/persist/PersistTachyon.java
Merge remote-tracking branch 'origin/master' into MM_tachyon_pers

Conflicts:
	.classpath
Fixed missing tachyon library in the eclipse configuration file.
Added tachyon to a list of libraries.
Merge remote-tracking branch 'origin/master' into MM_tachyon_pers
Disable compiler warning.
playing with effects of different enum mappings
Merge branch 'master' of github.com:0xdata/h2o
Merge remote-tracking branch 'origin/master' into MM_tachyon_pers