DEV-123 | release 0.3.4: update to next iteration
Merge branch 'releases/0.3.4' into 0.3.x

Conflicts:
	docs/conf.py
DEV-116 | problems related to virtualbox guest addition
Merge branch 'bugs/DEV-116-virtualbox-guest-addition-problem' into 0.3.x
Revert "DEV-116 | problems related to virtualbox guest addition"

This reverts commit 4ecacf83427858e72288997f0da8b843c47241fa.
DEV-154 | 'open_loop': redirection forbidden caused by berkshelf
Merge branch 'bugs/DEV-154-open_loop-redirection-forbidden-caused-by-berkshelf' into 0.3.x
DEV-116 | problems related to virtualbox guest addition
Merge branch 'bugs/DEV-116-virtualbox-guest-addition-problem' into 0.3.x
DEV-156 | Add options to specify base box version
Merge branch 'improvements/DEV-156-add-options-to-specify-base-box-version' into 0.3.x
DEV-156 | add options to specify base box version: add .strip() before .empty? check
Merge branch 'improvements/DEV-156-add-options-to-specify-base-box-version' into 0.3.x
DEV-116 | virtualbox guest addition problem: remove .virtualenvs mapping
Merge branch 'bugs/DEV-116-virtualbox-guest-addition-problem' into 0.3.x
DEV-116 | virtualbox guest addition problem: backward compatible with teracy/dev v0.3.4 base box
DEV-153 | release v0.3.5
Merge branch 'tasks/DEV-153-release-v0.3.5' into releases/0.3.5
Merge tag 'v0.3.5'

v0.3.5 Release