Developed plugin version selection feature

[danielemegna]

We developed the plugin version param to select a specific github release (or tag) to install on .vimrc:

Plugin 'kien/ctrlp.vim', {'version': '1.79'}

We also developed an automated bash test to check this functionality:

$ bash test/end2end/installSpecificPluginTagVersionTest.sh

We tested:

• New installation with specified version
• New installation with specified version and custom folder name
• New installation without specified version (unchanged behavior)
• Already present plugin installed with specified version and now reverted to not specified
• Already present plugin installed with specified version and now different version
• Already present plugin installed without specified version and now specified

[wsdjeg]

@gmarik will you add this feature?as i known you want vundle keep as KISS as possible

[danielemegna]

@wsdjeg imho it IS simple: the version attribute isn't mandatory of course and it would add a interested feature

[wsdjeg]

i kown ,it will be easy to control version

[shaunbrady]

@danielemegna This code looks good. Can you rebase/resolve the merge conflicts? I would like to test it out.

[danielemegna]

@shaunbrady sure, I can try it this weekend

[danielemegna]

@shaunbrady it looks ok now, could you test it?