Bug Fixes and new collaborator!

Thanks to all the awesome work Vinatorul has been doing on clap he's been added as an official collaborator to the project! Keep up the great work!

Here's the usual release notes thanks to clog:

v1.2.2 (2015-08-23)

Bug Fixes

• fixed confusing error message, also added test for it (fc7a31a7)
• App: fixed requirmets overriding (9c135eb7)

v1.2.1

v1.2.1 (2015-08-20)

Documentation

• README.md: updates for new features (16cf9245)

Features

• implements posix compatible conflicts for long args (8c2d48ac)
• added overrides to support conflicts in POSIX compatible manner (0b916a00)
• Args: allows defining POSIX compatible argument conflicts (d715646e)

Bug Fixes

• fixed links in cargo and license buttons (6d9837ad)

Performance

• Args and Apps: changes HashSet->Vec in some instances for increased performance (d0c3b379)

Custom Validations and more!

v1.2.0 (2015-08-15)

Bug Fixes

• fixed misspell and enum name (7df170d7)
• fixed use for clap crate (dc3ada73)

Documentation

• updates docs for new features (03496547)
• fixed docs for previous changes (ade36778)

Improvements

• AppSettings: adds ability to add multiple settings at once (4a00e251)

Features

• Replace application level settings with enum variants (618dc4e2)
• Args: allows for custom argument value validations to be defined (84ae2ddb, closes #170)

v1.1.6: Merge pull request #172 from kbknapp/clippy

v1.1.6 (2015-08-01)

Bug Fixes

• fixes two bugs in App when printing newlines in help and subcommands required error (d63c0136)

v1.1.5

v1.1.5 (2015-07-29)

Performance

• removes some unneeded allocations (93e915df)

v1.1.4

v1.1.4 (2015-07-20)

Improvements

• Usage Strings displays a [--] when it may be helpful (86c3be85)

Bug Fixes

• Macros fixes a typo in a macro generated error message (c9195c5f)
• Type Errors fixes formatting of error output when failed type parsing (fe5d95c6)

v1.1.3

v1.1.3 (2015-07-18)

Documentation

• updates README.md to include lack of color support on Windows (52f81e17)

Bug Fixes

• fixes formatting bug which prevented compiling on windows (9cb5dceb, closes #163)

v1.1.2

v1.1.2 (2015-07-17)

Bug Fixes

• fixes a bug when parsing multiple {n} newlines inside help strings (6d214b54)

v1.1.1

v1.1.1 (2015-07-17)

Bug Fixes

• fixes a logic bug and allows setting Arg::number_of_values() < 2 (42b6d1fc, closes #161)

v1.1

v1.1.0 (2015-07-16)

Features

• allows creating unified help messages, a la docopt or getopts (52bcd892, closes #158)
• allows stating all subcommands should not have --version flags (336c476f, closes #156)
• allows setting version number to auto-propagate through subcommands (bc66d3c6, closes #157)

Improvements

• Help Strings properly aligns and handles newlines in long help strings (f9800a29, closes #145)

Performance

• Help Messages big performance improvements when printing help messages (52bcd892)

Documentation

• updates readme with new features (8232f7bb)
• fix incorrect code example for App::subcommand_required (8889689d)