bump version to 0.8.15

bump version to 0.8.14

bump version to 0.8.13

bump version to 0.8.12

bump version to 0.8.11

bump version to 0.8.10

- 0.8.9 released to maven was based on 'httpclient-android'
  branch by mistake

bump version to 0.8.8

bump version to 0.8.5

bump version to 0.8.5

bump version to 0.8.4