[TIDOC-1191] Several additions and fixes:
   * Add 1.2.0 API related to dynamic styles
   * Add 1.1.0 API related to widget create methods
   * Add general introduction to Alloy and link to guides
   * Fix some links
[TIDOC-1191] Fix typo
[ALOY-746] minor wording and formatting changes for 1.2.0 API docs
Merge pull request #184 from appcelerator/ALOY-746

[ALOY-746] 1.2.0 inline API docs update