Get rid of checks in RF since H2O does them anyway
Updated quote handling in parser.

1. fields are only quoted if the quote is the first character.
2. fixed double quotes escaping.
RF1 loads non-local data by default.
Some DRF2 work, pull a too-strong assert

Assert in H2O.putIfMatch seems too strong, pulled.

Conflicts:
	src/main/java/hex/gbm/DRF.java
	src/main/java/hex/gbm/GBM.java
integrate w/master on DRF
Parse update. MAde single quotes optional and disabled by default to avoid problems with single quotes in datasets.
Added method to upload data from local machine to remote server
Add a comment about how to upload a file from curl.
Some DRF2 work, pull a too-strong assert

Assert in H2O.putIfMatch seems too strong, pulled.

Conflicts:
	src/main/java/hex/gbm/DRF.java
make parsing tolerate more NAs in a column before giving up
Fixed bug in the old parser (DParseTask) which was compering min < Integer.max instead of max < Integer.MAX which caused longs to be encoded as ints.
Mapping of columns domains.

If enums domains of compatible columns do not match, a mapping is
computed and a new vector transforming values is used.
elh: removed a test leaning on broken code