Revert "Updated gitignore"

This reverts commit 3f961a0a232425ae2310de773ce327ad69277d9a.
Travis file
Pushing to see travis do something
Fixed travis
Updated travis
Revert "Updated travis", Travis is down (works otherwise)
 - Fixes #9

This reverts commit afeaadd76823c58a874724942888fd3733546084.
Moved some few tests from main to unit test class
TrackerC & Tracker camel casing and main() removal
- Fixes #5, fixes #20
Camel casing for tests
All TrackerC tests separated
 - Fixes #5
Indentation
Camel casing for PayloadMap & PayloadMapC
 - Fixes #20
Remove eventVendor and eventName
 - Fixes #32
Removed last two mains
 - Fixes #5
PlowContractor -> ContractManager
 - Fixes #19
Removed context_vendor from tracker constructor
 - Fixes #36
Removed un-used base constructor
 - Fixes #23
Added CHANGELOG
Gradle wrapper jar
Travis to test against openjdk7 & oraclejdk7