params: extend and clean the CSV method.

* src/core/java/com/dataiku/dip/utils/Params.java: Here.
* src/core/java/com/dataiku/dip/utils/WithParams.java (WithParams):
  Adjust.
local file: Don't put `/./'.

Closes #50.

* src/dctc/java/com/dataiku/dctc/file/LocalFile.java: Here.
local file: Don't put the absolute path when we create a subfile.

Closes #51.

* src/dctc/java/com/dataiku/dctc/file/LocalFile.java: Here.
pretty string: Get Object instead of String as parameters.

* src/dctc/java/com/dataiku/dctc/PrettyString.java: Here. Make cat
  protected (quite dangerous).
style: Spaces changes.
time dimension (value): Extend and refactore.

* src/core/java/com/dataiku/dip/partitioning/TimeDimensionValue.java:
  Add a constructor with no argument but the time dimension. Create a
  function for glob format.

* src/core/java/com/dataiku/dip/partitioning/TimeDimension.java: Call
  formatGlob.
clean: Delete unused method.

* src/dctc/java/com/dataiku/dctc/file/SshFile.java: Here.