chore(docs): add roadmap

Author: ajoslin

ROADMAP.md

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+## Roadmap 
+
+#### Directive Maintainers
+
+Who will take the lead regarding any pull requests or decisions for a a directive?
+
+<table width="100%">
+<th>Component</th><th>Maintainer</th>
+<tr>
+  <td>accordion</td><td>@ajoslin</td>
+</tr>
+<tr>
+  <td>alert</td><td>@pkozlowski</td>
+</tr>
+<tr>
+  <td>bindHtml</td><td>frozen, use $sce?</td>
+</tr>
+<tr>
+  <td>buttons</td><td> @pkozlowski</td>
+</tr>
+<tr>
+  <td>carousel</td><td>@ajoslin</td>
+</tr>
+<tr>
+  <td>collapse</td><td>$animate (@chrisirhc)</td>
+</tr>
+<tr>
+  <td>datepicker</td><td>@bekos</td>
+</tr>
+<tr>
+  <td>dropdownToggle</td><td>@bekos</td>
+</tr>
+<tr>
+  <td>modal</td><td>@pkozlowski</td>
+</tr>
+<tr>
+  <td>pagination</td><td>@bekos</td>
+</tr>
+<tr>
+  <td>popover/tooltip</td><td>@chrisirhc</td>
+</tr>
+<tr>
+  <td>position</td><td>@ajoslin</td>
+</tr>
+<tr>
+  <td>progressbar</td><td>@bekos</td>
+</tr>
+<tr>
+  <td>rating</td><td>@bekos</td>
+</tr>
+<tr>
+  <td>tabs</td><td>@ajoslin</td>
+</tr>
+<tr>
+  <td>timepicker</td><td>@bekos</td>
+</tr>
+<tr>
+  <td>transition</td><td>@frozen, remove (@chrisirhc)</td>
+</tr>
+<tr>
+  <td>typeahead</td><td>@pkozlowski, @chrisirhc</td>
+</tr>
+</table>
+
+
+#### Attribute Prefix
+
+Each directive should make its own two-letter prefix
+
+`<tab tb-active=”true” tb-select=”doThis()”>`
+
+#### Use $animate
+
+* @chrisirhc is leading this
+
+#### New Build system
+
+* @ajoslin is leading this
+* Building everything on travis commit
+* Push to bower, nuget, cdnjs, etc
+
+#### Switch to ngdocs
+
+* http://github.com/petebacondarwin/angular-doc-gen
+
+### Conventions for whether attributes/options should be watched/evaluated-once
+
+- Boolean attributes
+- Stick AngularJS conventions rather than Bootstrap conventions
+