ChangeLog update, added Colaboration document

COLABORATION

@@ -0,0 +1,8 @@
+bashnapi is an open project I accept pull requests gladly. Please feel free to contact me if you would like to collaborate or post a patch for this project.
+
+Rules of thumb:
+===============
+
+- always fork the dev branch (your changes before merged to master will be merged there). dev represents current development state of the project and contains the newest code.
+- before posting a patch TEST it. Perform some manual verification first and use bashnapi test environment to verify if your delivery didn't brake anything else.
+- write tests for your code (refer to test suite readme under tests/ subdirectory for more details)

ChangeLog

@@ -1,6 +1,14 @@
-version v1.2.1
+version v1.2.1 (2014-06-11)
 - Major code redesign which includes
 -- decomposing code into small functional blocks
+-- assuring more compatibility with old shells
+-- implemented multithreading (spawning multiple processes ata time to speed
+		up the processing -F options)
+-- "skip" option reimplemented and made more flexible
+-- multiple verbosity levels
+- implemented unit test suite for napi.sh
+- prepared test environment for system & unit tests (based on Vagrant & Puppet)
+- prepared system tests for napi & subotage
 
 
 version v1.1.13 (2014-05-03)