Delete bug print.

* src/core/java/com/dataiku/dip/utils/StreamReplacement.java: Here.
rename variable: cache -> buffer.

* src/core/java/com/dataiku/dip/utils/StreamReplacement.java: Put the
  right name.
stream replacement: Delete map.

* src/core/java/com/dataiku/dip/utils/StreamReplacement.java: Keep
  only the best replacement. Add comments.
string replacement: Create eq function for the test.

* src/dctc/test/com/dataiku/dctc/StringReplacementTest.java: Help fo
  diagnose the source a bugs.
stream replacement: Skip generated character.

* src/core/java/com/dataiku/dip/utils/StreamReplacement.java: Avoid
  the infinite loop.
Start a news files.

* News.txt: Fill with the diff with 0.2.
Release instruction in hacking file.

* hacking/hacking.org: Here.
cmp: Implement skip.

* src/dctc/java/com/dataiku/dctc/command/Cmp.java: Here. Implement
  with x, xb, xib x = kmgtpezy.